Top Ten naturally aspirated engines

The Unit of measurement will be HP (KW)/Litre. In other words how much power is produced per litre of displacement also known as specific power. Easy, the higher the number, the more powerful the engine.

Number 10 Audi R8 GT
Engine: 5.2 FSI V10
Specs: 560hp/420kw; 540Nm
Specific power: 105hp(79kw)/litre

Number 9 Lotus Elise R Sport
Engine: 1.8 L inline 4 cylinder
Specs: 189hp/141kw; 181Nm
Specific power: 107hp(80kw)/litre

Number 8 Lamborghini Gallardo LP570-4 Superleggera
Engine: 5.2L V10
Specs: 570hp/425kw; 540Nm
Specific power: 108hp(81kw)/litre

Number 7 Ferrari 599 GTO
Engine: 6.0L V12
Specs: 670hp/500kw; 620Nm
Specific power: 110hp(82kw)/litre

Number 6 Lexus LFA
Engine: 4.8L V10
Specs: 552hp/411kw; 480Nm
Specific power: 115hp(86kw)/litre

Number 5 Porsche 911 GT3 RS
Engine: 3.8L flat six
Specs: 450hp/331kw; 430Nm
Specific power: 117hp(87kw)/litre

Number 4 Pagani Zonda R
Engine: 6.0L V12
Specs: 750hp/ 559kw; 710Nm
Specific power: 124hp(93kw)/litre

Number 3 Ferrari 458 Italia
Engine: 4.5L V8
Specs: 570hp/425kw; 540Nm
Specific power: 127hp(95kw)/litre

Number 2 Caparo T1
Engine: 3.5L V8
Specs: 575hp/429kw; 420Nm
Specific power: 167hp(123kw)/litre

Number 1 Mazda RX8
Engine: 1.3L Wankel 654×2 rotary engine
Specs: 232hp/173kw; 220Nm
Specific power: 174hp(130kw)/litre

Worlds 10 most specifically powerful naturally aspirated cars.

JohnV