Basically you'll find that its possible the car won't last as long...but your talking about the difference between the car needing significant engine/ancilleries work at 100,000 or 200,000 miles ... You'll still get good miles out of it before it played up (or you should but from what i've heard of the R56 running in etc might not make a difference
) You'll be fine....and like above if you run it hard from factory then in faxct th engine often performs better, but won't last as long (race engines are prepped like that as they are stripped so regular)