In 2005, Audi introduced the new generation of the S4.
It was available as a sedan, convertible and station-wagon, named Avant. It was a true factory sleeper.

At the beginning of the 2000s, Audi started to built faster cars that looked just like the other regular sedans from its lineup. Soon, it evolved by offering station-wagons with big and powerful engines.

From the outside, few elements could differentiate an S4 from a regular A4 model. There were few clues though, such as the chromed rim around the grilles (both the upper and the lower one) bigger wheels and tires and dual exhaust in the back. From the sides, the satin-silver door-mirrors were another distinctive element for the A4.

Inside, the front seats were signed by Recaro. They were the sport-bucket type with high bolstering for those who like to go fast on the corners even with a station-wagon. On the instrument cluster, Audi painted the S4 logo on the tachometer dial, so the driver knew that that was not an ordinary car.

In the back, there was room for three adults, but with limited shoulder room for all three and less legroom for the one in the middle. Due to the all-wheel-drive system, named Quattro by the Germans, there was a transmission tunnel that ran through the floor all the way to the rear differential. The trunk space was big and it could have been extended by folding the rear seats either completely or by a split 60:40 way.

The 4.2-liter V8 unit was the biggest engine ever installed on an A4 bodywork to the moment the S4 was introduced to the market. It was available with either a 6-speed manual or a 6-speed automatic.