The Top 10 Most Highly Tuned NASP Engines - No.8
8. Pagani Zonda R
Despite the highest redline to grace the leaderboard yet at 8700rpm, the Zonda R's AMG V12 actually ranks with the lowest piston speed out of all the entries at 23.3m/s, owing to it's short 80.2mm stroke!
Mercedes more than make up for this poor showing with what they do best, thumping torque. With 523lbft from 6.0 litres, it ranks with the second highest specific torque figure at 87lbft/litre.
Despite producing an already impressive 750bhp, the Zonda R is theoretically capable of 921bhp, meaning it ranks 8th with an NA PI of 814.