Originally Posted by Gav Diamond

Not sure if you was on here when Spadge was but he took his car to 2 rolling road shoot-outs in one weekend.

On the saturday at EA his car made 485bhp (i think it was)
On the Sunday at another set of rollers it made about 445bhp

Either way he had a 40bhp difference with just a change of rollers so i'd say there is quite a variation with different rollers against each other