Ruf RT 12
Rather than stick a single car into the number 10 slot, we thought it’d be more fun to round up the list with several… let’s say ‘unverified’ alternatives. No official showing from Porsche since the demise of the Carerra GT could easily be countered with a number of tuner 911 from specialists so deep into modification they actually count as independent manufacturers in some countries. Ruf and 9ff, for example, will happily sell you a professionally fettled 911 turbo capable of well over 200mph. Similarly, Brabus and others make a business out of making Mercedes go very quickly indeed, and the CLS based Rocket has 730bhp and is supposedly electronically limited to 217mph.