The 2014 Audi S4 features a 333 HP supercharged 3.0L V6 engine, matched with an optional 7 speed S-tronic dual clutch transmission. This vehicle features all wheel drive, with a 40/60 torque split front rear, and an optional sport differential, which is capable of torque vectoring. The four door sedan has seating for five, and is rated at 18/28 mpg city/highway. MSRP as tested is approximately $58,400.
Torque Vectoring Diff - http://youtu.be/qwwFZAbYGW0