2007 Audi S6
When Audi places an S in front of the number, magic things happen. Take the A6, 2005's World Car of the Year, and look at what the S treatment has done. Replacing the 3.2L and 4.2L engines is a 5.2L V10 that puts out a pleasing 440 hp and 396 lb/ft of torque. The only transmission choice is a 6-speed Tiptronic automatic.
