General idea of the Audi A4 In 1972, the Audi 80 was introduced for the first time. Since then, 4 generations of models from Ingolstadt have entered the market. All of them have been able...
Chassis of the car By their design, four independent suspension arms correspond to the front axle Audi A8 . Due to the arrangement of four transverse levers, it is achieved that...
Passenger protection The Audi A4 comes standard with two full size airbags. The volume of the air bag in the driver's air bag is about 70 liters, and the passenger's air bag next...
Full zinc coating As early as 1985, Audi introduced the first fully galvanized bodies in large series. At the same time, the metal, galvanized on both sides, is phosphated...
Quattro all-wheel drive If any company is said to have created all-wheel drive cars, then it is certainly Audi. Idea The VW Iltis all-terrain vehicle, developed by Audi on behalf of...
All-wheel drive concepts The Thorsen differential is based on the principle of a worm gear. The worm drive can be designed to provide a more or less high degree of blocking. The...
Distribution torsen differential 1 - drive to the front axle; 2 - hollow shaft (drive to gearbox); 3 - differential case; 4 - flange/cardan shaft (for rear axle drive); 5 - rear axle drive...
Driving dynamics on dry roads There is no doubt that the torsion differential works correctly and with sense in poor grip on the road. Therefore, here is an explanation of what happens in...
Instruction manuals for quattro cars Brake test stand Brake testing on each axle can be done on a standard, slowly rotating brake test bench (max. 6 km/h). In this case, the drive must be from a...
Differential lock mechanism If the previous model Audi 80 was still equipped with a mechanical locking of the rear axle, then in the A4 the locking is carried out by the EDS system. Its...
Additional maintenance work The only additional item in quattro maintenance is to check the oil level in the rear axle drive (gearbox oil GL 5 SAE 90). How to do this, please read the...
Engine compartment 74 kW four-cylinder engine 1 - battery; 2 - throttle cable; 3 - brake booster; 4 - expansion tank with brake fluid; 5 - expansion tank with coolant; 6 -...
Vehicle Specifications Engine Type 1,6 1,8 1,8 Turbo 2,6 V6 2,8 V6 Letter designation ADP ADR AEB ABC AAH Number of cylinders 4 4 4 6 6 Design Four-stroke in-line engine...