also from my own experience its possible to scare some serious metal once power is upped alot on these cars, i pushed a new m5 up the a42 in february on way to RR day where it made 230bhp at the fly, so again with similar stats, a new m5 on full m setting (504 odd bhp) is 270bhp per ton, my clio at 12psi made 230bhp on 900kg, so 260bhp per ton
and i think he failed to press his m button, so with only 400bhp he was pants downed :P