4. Ferrari 458 Speciale

For a company renowned for making world class NASP engines, Ferrari only manage to get one engine in this top ten list, but what an engine it is! With 398lbft from 4499cc, it ranks as a world record holder with the highest specific torque at 88lbft/litre. 

The 81mm crank thumps the pistons about at 24.3m/s at it's 9000rpm, indicating that there is a little left on the table for those daring to push the boundaries. Not that you ever would of course, even the race cars are detuned from this incredible specification!

With 597bhp out of a theoretical maximum of 685 the Ferrari 458 Speciale ranks 4th with an NA PI of 869.

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