Thanks OldF. So simple extrapolation from 32mm to 36mm (2017 WRC), would turn the 300Nm into 380Nm for R5 car. Once again, my calcs above do not seem unreasonable. And in any case nobody seems to dispute the 380hp max power for the 2017 WRC cars, which appears to be achieved at around 6500-7000rpm, which in turn using simple maths, translates into 411Nm of torque if the quoted max power was at 6500rpm or 382Nm of torque if quoted max power was at 7000rpm.