Any body knows about its engine!

Lamborghini's site should have this information.

I think it's the same size as the Murcielago Engine. I do know that It is completely blueprinted. So yes. The Reventon has a RACING ENGINE in it!:-)

Production 2008 only 20 built 2 door coupe' mid-engine, 4 wheel drive 6.5 liter (400 cu in) V12 LP640, 641hp 6speed E-gear or 6speed manual. wheel base 2,665 mm (104.9 in) Length 4,700 mm (190 in) Width 2,058 mm (81.0 in) Height 1,135 mm (44.7 in) 0-62mph 3.4 secs, max speed 210mph Hope this will help...

Reventon uses the exact same engine as the LP640. it has a different exhaust boost another 10hp

6.5 liter V12 Engine HP 650 hp @ 8000 rpm HP/Liter 100 hp per liter 0-62 mph 3.4 seconds Production 20 Weight 3671 lbs Torque 487 lb-ft @ 6000 rpm Top Speed 211 mph 6.5 litre displacement The Lamborghini Reventón has been entirely designed in Sant’Agata Bolognese, the original birthplace of the Lamborghini and the native home of every super car born under the sign of the bull. The design drawn up in Lamborghini’s Centro Stile (Style Centre) is fine-tuned in close collaboration with the Lamborghini Research and Development Department. Thus, the Reventón is not only “haute couture” but it also stands out for its elevated dynamism whilst being entirely suitable for every day use. The Lamborghini Reventón is not destined to remain a one-off. A total of 20 Lamborghini friends and collectors will be able to own this extraordinary car and, naturally, enjoy the incomparable pleasure of driving it. The name Reventón has been chosen according to Lamborghini tradition. Reventón was a fighting bull, owned by the Don Rodriguez family. It is included in the list of the most famous bulls ever and is known for killing the famed bullfighter Felix Guzman in 1943.

there is no way a lamborghini v12 is 400ci my car (1969 roadrunner) has a 400 in it and its a v8 (its supposed to have a 383 in it).