Comments by "BeyerT1" (@derbigpr500) on "Audi RS6 vs Ducati 1199 Panigale R - car vs bike track battle" video.

Now try comparing how fast they are on a real road, with bumps, camber changes, surface changes, etc. Not to mention rain... :P Bikes are only fast when conditions are absolutely perfect, and even then you're dancing on the line of being scraped off the tarmac with a shovel.
1