Audi RS6 Avant or Audi R8, Which Is The Fastest?

Though Audi claims that both the Audi RS6 Avant » 8/28/08 6:00pm 8/28/08 6:00pm and are equally fast to 62 mph and 124 mph, we've always been skeptical as to whether or not the Überwagen of our dreams could actually compete. Thankfully, the folks at mag had a version of each to test out. The bottom line? Almost. Both share a quarter-mile time of…