IO
Being pedantic, Power=torque x rpm/5250
Take a look at any graph showing both power and torque, you will see that they always cross at 5250 rpm.
Think of a gearbox as a torque multiplier. The R1 has a top gear equivalent to 2nd gear in most cars. If our cars could rev to 14,000rpm, they would be lively too. An F1 car produces very little torque, but revs to 18,000 and also a 6th/7th gear equivalent to 2nd in a Mondeo.
The requirement for a prop to turn slowly makes diesels ideal for a/c. Vibration is the only real problem.