As much as the E39 BMW M5 changed the game for sports sedans, the Audi RS6 took the executive supercar-slayer to the next level. Sporting a twin turbocharged version of the venerable 4.2 V8, the Audi RS6 offered simply stunning performance with 450hp on tap. But horsepower wasn’t the only result of the forced induction, because the RS6 also offered nearly 70 lb.ft of torque more than the S62 motor. Sure, it was a touch heavier than the E39, but on the highway this car was and still is a monster. Like the E39, good condition examples of these super sedans are now trading in the mid 20s; today there is a beautiful grey over grey example with no reserve on the auction. Looking ready to surprise a few 911s, take a look at one of our favorites: