Now if I told you that a big heavy Audi sedan spanked the entire grid of sports cars like the Viper, Corvette, BMW M3 and Porsche GT3s, you wouldn’t believe it, but in 2003 that’s exactly what happened.
Built by Champion Racing in 15 weeks, the SPEED World Challenge RS6 used a Cosworth-developed 4.2L twin turbo V8 making about 475 hp with a 6 speed quattro drivetrain.
At roughly 1,383 kg it relied on torque, traction and tire life rather than revs.
Randy Pobst won the 2003 drivers title and Audi took back to back manufacturers championships, with Galati winning multiple races in 2004.