Along with the new generation A4 and A4 Avant, Audi introduced its refreshed performance model, the Audi S4.
While considered a completely new model, the differences were more cosmetic, even if Audi made a few mechanical upgrades.

The S4 was initially available as a saloon body style, and compared to the previous generation, its exterior design became more stylish and sportier.

For 2005, the S4 joined the big grille family with the newly-designed trapezoidal singleframe grille. Other styling updates included differently-shaped side panels, new sweeping clear-glass HID headlamps, redesigned taillights, and quad exhaust pipes.

Inside, mild retouches have been made to enhance practicality and to offer a more luxurious feel.

Audi fitted the 2005 S4 with a better-looking 3-spoke steering wheel with a rectangular metal finish trim surrounding the four silver circle badge. The carmaker repositioned the steering wheel-mounted buttons for easier action. Its gear-stick was restyled with chrome accents, and the infotainment display was slightly moved toward the driver’s side.

Under the hood, the 2005 S4 featured the same old 4.2-liter V-8 powerplant with 339 hp. Even if the S4 was a heavy car weighing 1705 kg (3759 lbs), there was more than enough power to push the aggressive car close to super sports performance levels.

Mechanical upgrades included stiffened springs and dampers, sharpening the S4’s dynamics.