OK so you lot don't do miles and gallons but the Yanks still do (but have their own gallons) and the Brits can do either - 10 litres per 100km=28.24miles per gallon, 11 = 25.67, 12 = 23.53 and 14 = 20.17. Will that stop the metric moaning?

3000 rpm=142/3 kph, 4000rpm=190kph,
4500rpm=210kph/131mph as of yesterday, traffic permitting.