Audi S5 Avant by ABT Sportsline comes with more power, some exterior enhancements, and a few extras on the inside ...

The 2012 Audi S4 exists to satisfy power-hungry customers who find the pedestrian A4 - and its 2.0-liter turbo four - inadequate. Instead, the S4 is packed with a supercharged 3.0-liter V-6-engine ...

The Audi S4 is the automaker's original compact sports sedan, priced above the Audi S3 sedan and below the Audi S6, S7, and S8 sedans in the automaker's S series of sporty four-door models.