The Audi S6 was introduced in 1994 as a faster version of the A6. The S6 when introduced was almost the same as the S4 which was going out of production. The only change was that the S6 was a new name and it had a new body. The company wanted a sports model in the cars it was selling so it made a few changes in the S4 and began selling it as the S6. The new S6 had a 2.2 liter five cylinder engine, which could achieve 100 kilometers per hour in 6.1 seconds. The vehicle was equipped with a 6 speed manual gears and the Quattro all-wheel drive. The S6 engine was now upgraded to a new V8 engine and the vehicle had an automatic gear system, though optional was the 6 speed manual gear system. In 1997, Audi brought in the S6 plus, which had a 32 valve V8 engine.

Audi introduced the second series of the S6 in 1999, which had a 4.2 liter V8 engine. The vehicle had a Quattro all-wheel drive and one could choose between a six speed manual and a 5 speed Tectonic gear system. The S6 had an aluminum body 17 inch cast alloy tires. In the year 2000 Audi upgraded the S6 engine to the 4.2 liters V8 engine. Audi stopped production of the 1999/2000 S6 in 2003.

In 2006 the third version of the S6 came into the market. The new S6 is now powered by a 5.2 liter V10. The car has been equipped with the Quattro All-wheel drive. The car has leather seats, a stereo which has both AM and FM channels as well as CD and MP3 formats. The Driver has got a seat that can be adjusted in 12 different ways, the seats in the back that are foldable and the vehicle has 16 inch alloy tires. The Audi S6 has been given a very sporty look and to reduce the weight of the vehicle some of its body parts are made up of aluminum. Seats in the S6 are comfortable and there is plenty of room for storing shoes or sports equipment.