You have your pick from a pair of fraternal twins. The S7 is slightly better on the eyes and offers a good amount of trunk space. The S6, on the other hand, is slightly more practical for people, with more room for four friends. They are mechanically identical, varying minutely in measurements and looks. We say save up for the new RS7; who needs friends when you still have road ahead? Besides, you’ll need all your free time to master this car’s prestigious amounts of power. It’s the most horsepower of any RS model, even producing more than the R8. It may be hard to spot the RS7 as it races past you at tremendous speeds, but listen for a ravenous exhaust note and look for those signature RS air intakes and quad exhaust tips. It retains Quattro all-wheel drive, a must with this much power onboard, but that power forces Audi‘s hand in another way: it had to replace the S7’s dual-clutch transmission for an eight-speed automatic. Europeans get a performance package that raises the top speed to 189 miles per hour; ours will be limited to 174.
Engine: 4.0-liter twin-turbocharged V-8
0-60: 3,7 seconds
Top Speed: 174 mph (limited)
Transmission: 8-speed automatic
Torque: 516 foot-pounds