The 2012 Audi ... S4 sports minor differences compared to the regular A4 sedan. First, the front fascia features a unique grille treatment and reworked lower air dam. On the side, 18-inch wheels ...

This iconic S4 ... in the Audi and 37.6 inches in the BMW. Second-row legroom is 35.7 inches in the S4, a bit more than the 35.2 inches in the M340i. All S4 trim levels feature a 10.1-inch ...