If the 4tec and rs4 3 both had the same engine and gearing, the 4tec would still go faster because it takes 2 turns on the 4tec's spur gear to make the tire spin once, while the rs4 takes 3 turns to make the tire spin once. But when it comes to handling, the rs4 definitely kicks some *****. Just drop in a fantom fr15 (42,500 RPMs) It's a killer!!!!