Originally Posted by 300hp
This is one of those things where it's tough to prove. BMW quotes the x drive at 4.8s to 60 with the run flats. 4.8 is more than adequate for most folks. If you can find a 335 x drive doing the deed in say 4.2s, which is impossible I guess so I will lower it to 4.6 then you have a point that rfts are robbing performance. Most publications have reported braking and lateral g numbers in line with the best in the segment, the ATS for example. The burden of proof is upon you sir
RFT will not impact straight line performance. Who gives a f3/-: about that? Try turning at speed on a track.