The £41,000 Kawasaki H2R is the fastest production bike we've ever tested, with a weight of 216kg and 250bhp. It's certainly not for the faint hearted.
Alongside sits £215,000 worth of Aprilia ART MotoGP bike, which produces 230bhp and weighs just 165kg. This one's going to be close.
See all the other head-to-heads in our acceleration super-test video, here.