Impressive, thanks for sharing!
I don't understand how the real whp numbers are so equal in the 1M and in the M3 and the factory numbers are so different, if BMW was conservative with the 1M it should have been with the M3 too I guess, BMW isn't stupid and woudn't annouce numbers that are impossible to prove real so, to me, it makes no sense, also the 1M acceleration numbers seem to look normal for a 340hp car, ~16/17 seconds to 200kph (124mph), more a less the same as a base Porsche 911 carrera (997.2) with 345hp.
Since the 1M and M3 acceleration numbers are so equally matched, maybe it's the M3 that is slow for a 420hp car??
