This crazy car is powered by a 30-litre V12 air-cooled engine that was nicked from a M47 Patton tank. J Leno then added Champ car turbos and fuel injection to boost power beyond 1600bhp. Transmission is a special 6-speed auto gearbox J Leno had especially commissioned so at 70mph the engine is turning over at just 1200rpm. It’s 28 feet long and weighs 5 tonnes but performance is described as scary. br br By EVO Magazine.