The Top 10 Most Highly Tuned NASP Engines - No.3
3. Audi R8 V10 Plus
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One way to ensure two entries in the NASP hall of fame is to take one engine that's already made it, and add two more cylinders!
With a 5.2 litre V10 producing 413lbft, the specific torque is strong if not world-class at 79lbft/litre, but like it's smaller sibling it tops the leaderboard for piston speed, punishing the pistons with an absolutely brutal 25.5m/s at it's 8250rpm redline.
With 610bhp out of a theoretical maximum of 692 the Audi R8 V10 Plus ranks 3rd with an NA PI of 881.