The 2018 BMW M5 is massively quick. The F90 is the first four-wheel-drive M5, meaning it has buckets of traction to put down its 600hp. But is it faster than a diesel Seat Arosa?
Oddly for an Italian roadster known at home as ‘little boat’, its scourge is water. Still, find one free of corrosion and you can expect plain sailing ahead