Audi four-wheel drive model. Legends of all-wheel drive Audi Quattro models in a mini-review

Quattro (translated from Italian for “four”) is a proprietary all-wheel drive system used on Audi cars. The design is a classic scheme borrowed from SUVs - the engine and gearbox are located longitudinally. The intelligent system provides the best dynamic performance based on road conditions and wheel traction. Cars have outstanding handling and grip on any type of road surface.

History of appearance

For the first time a passenger car with a similar design of the all-wheel drive system was introduced at the Geneva Motor Show in 1980. The prototype was the military jeep Volkswagen Iltis. Tests during its development in the late 1970s showed excellent handling and predictable behavior on slippery snowy roads. The idea to introduce the all-wheel drive concept of an SUV into the design of a passenger car was implemented on the basis of the Audi 80 serial coupe. The symbol of the Quattro intelligent all-wheel drive system is an electromechanical gecko

The constant victories of the first model Audi Quattro in rally races proved the correctness of the chosen concept of all-wheel drive. Contrary to the doubts of critics, whose main argument was the bulkiness of the transmission, ingenious engineering solutions turned this disadvantage into an advantage.

The new Audi Quattro has received excellent stability. Approximately ideal distribution of weight along the axes became possible precisely thanks to the layout of the transmission. The 1980 Audi all-wheel drive car became a rally legend and an exclusive serial coupe.

System development

1st generation

The first generation quattro system was equipped with inter-wheel and inter-axle differentials of a free type with the possibility of forced hard blocking by a mechanical drive. In 1981, the system was modified, the locks began to be switched on using pneumatics.
Rally version of the 1980 Audi Quattro

Models: Quattro, 80, Quattro Cupe, 100.

II generation

In 1987, Type 1 took the place of the free center axle. The model was distinguished by the transverse arrangement of satellite gears relative to the drive shaft. Torque transmission varied 50/50 under normal conditions, with up to 80% of the power transferred to the axle with the best grip when spinning. The rear was equipped with an automatic unlocking function at speeds above 25 km / h.

Models: 100, Quattro, 80/90 quattro NG, S2, RS2 Avant, S4, A6, S6.

III generation

In 1988, an electronic differential lock was introduced. The torque was redistributed along the axles, taking into account the strength of their adhesion to the road. The control was carried out by the EDS system, which slowed down the slipping wheels. The electronics automatically connected the blocking of the multi-plate clutch of the center and free front differentials. Torsen self-locking differential moved to the rear axle.

Model: Audi V8.

IV generation

1995 - an electronic locking system for front and rear free-type differentials was installed. Center differential - Torsen Type 1 or Type 2. Standard torque distribution mode - 50/50, with the ability to transfer up to 75% of the power to one axle.

Models: A4, S4, RS4, A6, S6, RS6, allroad, A8, S8.

5th generation

In 2006, the Torsen Type3 asymmetrical center differential was introduced. A distinctive feature from previous generations is that the satellites are located parallel to the drive shaft. Cross-axle differentials - free, with electronic blocking. The torque distribution under normal conditions occurs in the proportion of 40/60. When slipping, the power increases to 70% on the front and up to 80% on the rear axle. With the use of the ESP system, it became possible to transmit up to 100% of torque to one axle.

Models: S4, RS4, Q7.

VI generation

In 2010, the design elements of the all-wheel drive of the new Audi RS5 have undergone a significant change. A center differential of our own design was installed based on the technology of interaction of flat gears. Compared to Torsen, this is a more efficient solution for stable torque distribution under various driving conditions.

Quattro center differential based on flat gears

In normal mode, the power ratio is 40:60 for the front and rear axles. If necessary, the differential transfers up to 75% of the power to the front axle and up to 85% to the rear axle. It is lighter and easier to integrate into the operation of the control electronics. As a result of the application of the new differential, the dynamic characteristics of the car are flexibly changed depending on any conditions: the grip of the tires on the road, the nature of the movement and the driving style.

Elements of a modern system

A modern Quattro transmission consists of the following main elements:

• Transmission.
• and center differential in one housing.
• Main gear, structurally made in the rear differential housing.
• Cardan transmission that transmits torque from the center differential to the driven axles.
• Center differential that distributes power between the front and rear axles.
• Front differential free type with electronic lock.
• Rear free differential with electronic lock.

Elements of the Quattro system

The Quattro system is characterized by increased reliability and wear resistance of the elements. This fact is confirmed by three decades of operation of both serial and rally Audi cars. The breakdowns that have occurred are mainly the result of incorrect or excessively intensive operation.

Principle of operation

The Quattro all-wheel drive principle is based on the most efficient distribution of power during wheel spin. The electronics reads the readings of the anti-lock braking system sensors and compares the angular speeds of all wheels. When a critical limit is exceeded by one of the wheels, it slows down.

At the same time, it turns on, and the torque in the right ratio is distributed to the wheel with the best grip. Electronics distributes power in accordance with a verified algorithm. The algorithm of operation, developed through numerous tests and analysis of the behavior of the car under various driving conditions and road surface conditions, ensures maximum active safety. This makes driving predictable in difficult conditions.

The effectiveness of the applied interlocks and the control electronic system makes it possible for Audi all-wheel drive vehicles to move off without slipping on any type of road surface. This property provides excellent dynamic qualities and cross-country ability.

Quattro is an Audi-registered all-wheel drive technology that first appeared on the German brand in 1980. The first model to feature Quattro all-wheel drive was the Audi Quattro two-door coupe. Subsequently, all models manufactured by this company began to be equipped with Quattro all-wheel drive. A feature of this technology is that the all-wheel drive system is used on vehicles with a longitudinal engine and transmission. It is customary to distinguish six unofficial generations of the Quattro all-wheel drive system.

The first generation was produced from 1980 to 1987. A feature of this generation Quattro was the use of three open differentials (front, rear and center), moreover, the front differential was without a locking function, and the rear and center had a manual locking function.

The second generation of the Quattro system was produced from 1988 to 1995. A feature of this generation was the use of the Torsen central differential, which, when driving on normal road surfaces, evenly distributed torque on both axles, and, if necessary, could redirect up to 75% of the torque to the desired axle.

The third generation Quattro was produced simultaneously with the second, but this system was installed only on the Audi V8. The specificity of this generation of the all-wheel drive system was the use of a central differential with a planetary gear and a multi-plate lockup clutch, which was controlled by electronics. This version of the Quattro was typical for modifications with automatic transmission. For versions with a manual transmission, the Torsen served as a center differential.

The fourth generation of the Quattro system has been installed on all-wheel drive modifications of Audi models since 1995. The changes that have affected this generation of the all-wheel drive system relate to the use of an electronic EDL lock for open front and rear differentials. Central differential - second generation Torsen.

In the fifth generation Quattro, which began to be equipped with Audi models since 2006, the transformation touched the center differential. There was a third generation Torsen with a standard 40/60 torque distribution between the front and rear axles. In conditions of poor grip with the road surface, the differential changed the torque ratio, transferring from 80 to 100% (with the assistance of the ESP system) of the moment to one of the axles.

Finally, the sixth generation Quattro, released in 2010, was marked by the replacement of Torsen with a central one with flat gears. It allows you to distribute up to 75% of the torque to the front axle, and up to 80% of the torque to the rear.

Schematic quattro. 1) gearbox 2)
transfer box 3) cardan gear
4) main gear and rear cross-axle differential
5) front axle drive shaft
6) main gear and front cross-axle differential

The quattro all-wheel drive system has been used by Audi on its cars for over 25 years.

Its distinguishing feature is that it constantly distributes torque, taking into account the need, simultaneously between four wheels. This property allows for excellent active safety performance, stable grip of all wheels on all surfaces, maintaining perfect stability even in the event of a side wind.

Quattro all-wheel drive system allows you to make instant acceleration, achieve good handling, while maintaining stability when making maneuvers and diverging from an oncoming car at high speeds.

So what is it that allows vehicles with quattro all-wheel drive to achieve such perfect performance?

A feature of quattro technology is that it is used on machines where the engine and transmission are placed longitudinally. There are six generations of all-wheel drive system Quattro according to unofficial statistics.

Four-wheel drive on Audi cars was carried out by the grandson of Ferdinand Porsche - engineer Ferdinand Piech. He was the first to introduce an all-wheel drive system in the Audi 80. A cardan shaft was used to drive the rear wheels, the rear gearbox was the same in design as the front one, but it was turned 180 degrees. This design was distinguished by the absence of an interaxle differential, which led to certain difficulties in sharp turns and when parking. This test car was dubbed the Audi A1 (Project 262).

Then the second generation appeared, where the center differential had already appeared. Gradually, new changes and improvements were introduced, developing the quattro all-wheel drive system, the best of which have survived to this day.

System device

Today, there are various modifications of Quattro all-wheel drive systems, but despite the differences in their designs, a common device stands out:

gearbox, transfer case, rear axle drive, and rear axle differential, front axle drive shaft, final drive and front axle differential.

Diagram of the quattro all-wheel drive system:
1 - gearbox; 2 - transfer case; 3 - cardan transmission; 4 - main gear and rear cross-axle differential; 5 - front axle drive shaft; 6 - main gear and front cross-axle differential.

The transmission can be equipped with both an automatic transmission and a manual transmission. The transfer box is connected directly to the gearbox.

By design, it provides the inclusion of an interaxle differential, which distributes torque to the rear and front axles. The differential housing is mechanically connected to the gearbox. The torque on the axle can be distributed depending on the design of the transfer case through a separate gear train or drive shafts.

How quattro works

The principle of operation of quattro can be seen on the example of quattro VI used on the Audi RS5. The differential, which is equipped with ring gears, has a traction distribution in normal conditions of 40:60. With automatic partial blocking, thrust transfer is carried out within 70/30 to 15/85 (forward / backward).

As soon as there is a difference between the front and rear wheels in the speed of rotation, the satellites turn and, thanks to the profile of the teeth, the driven end gears move apart, compressing the clutch package. He also produces a partial differential lock. The highest torque that can be applied to the rear axle reaches 85%, to the front - about 70%. Due to the fact that the ring gear differential has a wide range of torque redistribution, it significantly outperforms its previous opponents in terms of traction provided. Torque and forces are redistributed according to driving conditions and without delay. Maximum speed and efficiency are ensured by working on a mechanical principle.

One of the main advantages of a crown gear differential is its low weight and compactness. The assembly weighs nearly 2kg less than the previous generation differential, weighing in at 4.8kg. In the RS 5, engineers combine a crown gear differential with software that manages braking, called torque vectoring. The new system allows for a dynamic and precise vehicle behavior in any cornering.

Video:

Today, three versions of the quattro lead the avant-garde of all-wheel drive technology: quattro permanent all-wheel drive, quattro permanent all-wheel drive with crown gears and center differential, and quattro with sport differential.

Not so long ago it became known that a completely new all-wheel drive transmission is waiting for us soon. The proprietary Quattro system will change dramatically, becoming electric. The front wheels will still be driven by a traditional motor, while the rear wheels will be powered by two electric motors. That is, it will become a hybrid, and will comply with the Plug-in Hybrid Electric Vehicle technology, which will allow trips only from electric traction, and the batteries can be recharged from a conventional household electrical network.

Rice is a quattro hybrid powertrain:
1 - internal combustion engine; 2 - gearbox; 3 - high voltage cable; 4 - electric motor; 5 - high-voltage storage battery; 6 - rear axle with electric drive.

Since the advent of Quattro technology to this day, it has been improving, thanks to the fact that the leading and best engineers of the Audi concern are working on it, using the most advanced technologies and solutions in its development. There is no limit to perfection, so the quattro system will evolve, moving progress into the future.

The unique Quattro system was installed on many Audi cars from the 80s to the late 2000s, and has only recently been replaced by a more modern version of the all-wheel drive E-tronQuattro. Such a long period of use of this dispensing mechanism is due to its revolutionary device, which in its functionality, durability and practicality far exceeded even the wildest expectations. The system under consideration was designed to distribute torque evenly between all wheels, which allows the driver to facilitate vehicle control on any type of surface. As a result, the agility, stability, and cross-country ability of Audi cars have improved significantly, thanks to which the brand's sales have skyrocketed.

History of creation

Before the creation of all-wheel drive, manufacturers of passenger cars reached their hands only in the early 70s of the last century. Nevertheless, the world developers failed to create anything worthwhile until 1977, when Ferdinand Piech, who at that time was the head of the board of directors of Audi, formed a brilliant team of experts, setting them the task of seamlessly introducing all-wheel drive to passenger cars. The main people in the team were Jörg Bensinger and Walter Treser, who designed the test prototype A 1. It was a modified Audi 80 sports coupe with a chassis installed on it from the Iltis SUV model released a few years earlier.

The main feature of the prototype was the rear shaft attached to the gearbox drive mechanism.

As a rear drive, a front axle with a differential housing inclined at a certain angle was used. It was identical to the mechanism used on the Iltis model, but the developers turned it back to improve the car's handling on uneven surfaces. As a result, the system was successfully tested both on a flat track and in the field, having proven itself only from the best side. However, the fate of the serial installation of the first Quattro all-wheel drive was to be decided by the management of the Volkswagen concern, which included Audi.

After technical tests on a snowy track, a decision was made to finalize the system in front of the head of the board of directors of the concern. The fact is that on sharp turns, the stability of the car left much to be desired, and the likelihood of a rollover increased several times. To fix the problem, a center differential was mounted behind the box, which was driven by a special hollow shaft. On the one hand, the drive of the front axle was connected to it, on the other hand, the cardan shaft was joined, transmitting torque to the rear axle of the car. This version of the all-wheel drive Quattro was tested on a wet track, after which it received approval for serial installation. The first owners of such a system were Audi 80 coupes and sedans, a legendary car that can still be found on domestic roads today.

Success in sports

The advantage provided by Audi's innovative development in rally racing is unmatched. For more than 10 years, no analogue could even compare closely with, therefore, racers who installed such mechanisms on their vehicles won tens of seconds on a circle from more experienced opponents. Sometimes the rules in rally competitions reached the point of absurdity: for cars where the system in question was introduced, several minutes were charged in advance by the final time. Many cars were not allowed to compete at all, which is why the entertainment of motorsport at that time fell significantly.

Despite numerous judicial bans, Audi cars with the invention of the Quattro managed to win most of the races in the 1982/83 season, including rallies in Portugal, Argentina, Finland, Sweden, etc. By 1985, almost all teams switched to Audi's all-wheel drive versions , so the existing restrictions were lifted by the organizers of the races. In addition, for sports competitions, the developers of the Volkswagen concern released a number of versions of the Quattro system, which received the Rally and Sport prefixes. The dominance of Audi cars in motorsport lasted for more than 15 years, but in 1997 the leadership of the FIA ​​organization banned vehicles from racing with the mentioned all-wheel drive system. Since then, the Quattro system has been installed only in civilian cars.

Movement technology

Of course, the presented system has a number of modifications designed to give certain technical characteristics to a particular brand of vehicle that has rolled off the Audi assembly line. However, such a development has the following indispensable elements:

• Gearbox - is used to select the speed of the vehicle;
• Main gear - designed to increase torque to all wheels;
• Transfer case - distributes torque between all wheels or axles;
• Cardan gear - needed to transmit torque only to a specific shaft;
• Differential - quickly distributes engine power to transmission elements.

All components with which the Quattro system is equipped, both together and individually, have a high degree of reliability.

Cases of device breakdowns on numerous Audi models were isolated, while they were most often associated with intensive or improper use of the vehicle. The all-wheel drive transmission could be combined with an automatic or manual gearbox, to which a transfer mechanism was attached. In its design there was an interaxle differential, which evenly transferred the load to the front and rear axles. The body of this element, in turn, was connected to the gearbox, and the torque was distributed either through the drive shafts or using a separate gear train.

If we consider in detail the design of the Quattro all-wheel drive center differential, then during the period of its existence it has undergone a number of changes. In the early 1980s, it was a free mechanism with a mechanical lock, but a few years later it was replaced by the original Torsen unit, capable of transferring up to 80% of the load to the desired axle. In 2007, this mechanism was upgraded, with the ability to distribute up to 70% of the torque to the axle with better grip. Three years later, an asymmetric differential was installed on Audi brands with the ability to self-lock and redistribute the load up to 70% on the front axle, up to 85% of the load on the rear axle.

At the beginning of 2010, the described system underwent a number of changes, and now the principle of operation of the units is based on the operation of a hybrid power plant. In addition to the power plant, as well as the gearbox, two autonomous electric motors are attached, the power of which is estimated at 33 kW and 60 kW. For the rear axle, only an electric drive is provided, the power of which is entrusted to a separate battery mounted in the central tunnel of the car. This innovation was adopted in order to reduce emissions of harmful substances into the atmosphere, because it is no secret to anyone that cars with an all-wheel drive system consume much more fuel than their counterparts with front or rear-wheel drive.

Advantages and disadvantages

Of course, vehicles with a Quattro system have both positive and negative characteristics. Initially, let's talk about the advantages of all-wheel drive, the list of which invariably includes:

• Stability on any type of road surface;
• Increased efficiency of engine braking;
• Excellent cross-country performance;
• Immediate steering response.

An additional advantage of Audi cars with the Quattro designation was the rapid start of movement with the scrolling of all four wheels at the same time, which allows even on slippery roads to gain optimal speed in a matter of seconds. In this case, prolonged slippage is almost completely excluded and occurs only when the tires of the vehicle are in a deplorable state.

Unfortunately, the Quattro system has a number of minor drawbacks. The list includes factors such as:

• Increased fuel consumption;
• Increased requirements for the care of car operation;
• Expensive repair of the mechanism in case of failure.

Another disadvantage of a car with all-wheel drive is the high probability of loss of directional stability in extreme situations. With poor road traction, inexperienced drivers all too often make one common mistake: entering a sharp turn at high speed. The Quattro system simply does not have time to distribute the torque in a timely manner, as a result of which the vehicle goes into a skid. Therefore, in rainy or snowy weather, experts recommend not to press hard on the gas pedal, otherwise you can get into a serious accident.

Legendary Audi brands with the drive in question

Four-wheel drive Quattro was installed on dozens of models of the German concern Volkswagen, however, only a few of them have acquired the status of road legends. One of the fastest sports cars was the AudiQuattroCoupe, which features a graceful body shape, a powerful 2.8-liter power unit, and the ability to reach 100 km/h in just 7 seconds. For 1991, when the car was first presented to potential buyers, this was a remarkable indicator.

For fans of extreme driving, Audi developers introduced the SportQuattro version. With a shortened wheelbase, the model could produce a phenomenal 302 horsepower, accelerating from standstill to 100 km / h in less than 5 seconds. It was such a car that most often participated in rally competitions, therefore, fuel outlet gills along with air intake nostrils on the hood were introduced into its body structure.

For a quiet measured ride, the AudiAvantQuattro series was designed, which had a spacious luggage compartment, a comfortable interior and excellent visibility of the road situation. In these machines, in addition to the all-wheel drive system, roll control devices were introduced, a reliable line of engines with an unpretentious suspension. Over the period of its existence, AudiAvant models have established themselves as the ideal car for family use.

Thus, the Quattro all-wheel drive has become a real revolutionary achievement of German designers, which made it possible to improve the technical characteristics of the car, give it acceleration dynamics and stability on various road surfaces.

Not really

Four-wheel drive vehicles are the passion of many lovers of quality vehicles. We often dream that our car has enough performance to overcome difficult obstacles, off-road or terrible road conditions. Today, each company has its own technologies for implementing all-wheel drive in crossovers and SUVs, but not all implementations turn out to be really high-quality and convenient. In today's publication, we will consider the possibilities of two popular German technologies from the same concern. Quattro all-wheel drive is used in Audi cars, and 4Motion technology adorns the complete set of Volkswagen cars. Despite the closeness of these two drive options, they also have certain differences.

Experts will say that comparing these systems does not make much sense, especially if we are talking about the importance of all-wheel drive in a car. All four-wheel drive systems at Volkswagen AG have similar characteristics and are based on Torsen or Haldex couplings. In fact, these systems differ only in names, so it makes no sense to compare them. Comparing these two all-wheel drive options makes sense with systems from other manufacturers. However, many modern 4WD or AWD systems are made according to this scheme.

What is the difference between Quattro, 4Motion and other technologies?

By and large, there are no technical differences between the various all-wheel drive systems. The manufacturer calls the Quattro and 4Motion systems permanent all-wheel drive, but in reality this is not the case. The clutch starts to work only in those situations when the car experiences certain difficulties with movement. Otherwise, all-wheel drive works very poorly, it is not felt at all on the track. And in this case, it makes no sense to compare the two types of all-wheel drive. Successful solutions are based on the following features of these elastic systems:

• a certain set of settings for controlling all-wheel drive is adjusted for each car;
• the drive turns out to be quite elastic, it is not designed to overcome obstacles, but only adds to the impressions of the trip;
• 4Motion and Quattro are connected safely, the car does not jerk when torque is applied to all wheels;
• the clutch is very reliable, during the life of the car you are unlikely to have to repair the all-wheel drive system;
• emotions from driving a car with such systems are very colorful, transport surprises with its handling;
• you do not have to manage the four-wheel drive through various manual settings - everything is done automatically.

There is no need to learn how to drive a car with an all-wheel drive system. You can simply use the car for its intended purpose and not think about technical details. But these many do not like the Quattro and 4Motion all-wheel drive. After all, sometimes you want to feel the difference, and sometimes just turn off one bridge and save fuel. But there are no such functions in these systems. All-wheel drive from Volkswagen AG is surprisingly technological and high-quality, but it is not suitable for a professional driver or racer who wants to feel all the subtleties of the car's behavior on his own.

Comparison of all-wheel drive Volkswagen with other manufacturers

The only comparison that makes sense in this case is comparing Quattro and 4Motion all-wheel drive to Subaru technologies. Japanese all-wheel drive technology has been developed to incredible heights, with the legendary Subaru system receiving the award for the best all-wheel drive systems every year. But not all cars of the concern have this legendary four-wheel drive. There are many trim levels with the usual Full Time 4WD, the same performance as the Volkswagen. However, basic all-wheel drive on expensive cars is exactly proprietary technology with the following important advantages:

• the possibility of manual control of the high-quality functions of the all-wheel drive of the car;
• full control and fine-tuning of the operation of transport in a particular case and in different driving conditions;
• an incredibly sensitive clutch that has all the necessary locks, everything is implemented in the mechanical part;
• no electronic imitations of control and blocking, everything works according to traditional technologies;
• lack of weak points that could break after several years of operation.

Unlike Subaru, Volkswagen's all-wheel-drive cars don't have the same interesting features. This leads to the fact that users of German-made cars do not always remember what functionality is present in their car. Given all the features of Japanese technology, if you want a car with good control functions, you should give preference to the Japanese. But in case you are satisfied with the lack of a mass of adjustments and settings, it is better to buy a German car.

Novelties and development of German all-wheel drive technology

Given the fact that all manufacturers in Europe and China follow the example of Quattro and 4Motion, the company is constantly improving its technologies. Successful solutions in all respects annually supplement the technical base of cars produced. It is quality and functionality that become the main changeable functions. The concern introduces new interesting technologies that allow you to keep the car on the track at high speed, reduce the feeling of being squeezed into the seat when accelerating, and also serve to perform other important tasks:

• lack of weaknesses and repair of childhood diseases of the all-wheel drive system and computer control function;
• improvement of the gearbox, which is the main device in the transmission system;
• reducing the effect of connecting all-wheel drive in the presence of such an automatic function;
• increasing the comfort of the trip and the implementation of behaviors unusual for a powerful car;
• integration of new technical units developed directly by the engineers of the German company;
• reducing the cost of implementing the all-wheel drive design and facilitating all elements of this system.

Reducing the weight of the machine has become a real object of pursuit for modern manufacturers. Also, the German concern is strongly focused on reducing fuel consumption. Therefore, the company offers customers constantly new and new technologies for the implementation of a variety of solutions. In particular, four-wheel drive used to be a factor in increasing consumption, but today 4Motion and Quattro have little to no effect on consumption. A few percent increase appears only due to the greater weight of the car. And such subtleties inspire a certain confidence in new developments, despite their high cost for the company. However, the price of cars has long ceased to rise actively. This is how you can drive this four-wheel drive, if you know how to really drive a car:

Summing up

Four-wheel drive based on German Quattro and 4Motion technologies is a completely adequate system for an ordinary passenger car. But if a full-fledged large SUV was present in the manufacturer’s model line, such a system would look pretty ridiculous on it. The corporation has repeatedly worked on the creation of a classic mechanical all-wheel drive, but all developments ended with the fact that the integration of the invented systems into cars looked pointless. Unless Amarok could claim to get a more efficient all-wheel drive system, but this is not a car in which the buyer agrees to pay for such developments.

Therefore, for Volkswagen, the existing technologies of a simple but confident all-wheel drive remain the only and optimal ones. Every year they are refined, changed and receive certain minor updates. But this is no longer so important, because the technology remains the same, the principle of operation does not change. If you are interested in the technical part of the car's all-wheel drive, it is better to ask your questions to the manager in the cabin, who should know the pros and cons of this drive option, as well as compare with the main competitors. How do you feel about amateur all-wheel drive systems like 4Motion and Quattro?