Lamborghini Countach LP 400S

Engine
The rear wheels were driven by a traditional Lamborghini V12 engine mounted longitudinally with a mid-engined configuration. This contrasted with the Miura, on which the centrally mounted engine had been installed transversely. For better weight distribution, the engine is pointed "backwards"; the output shaft is at the front, and the gearbox is in front of the engine, the driveshaft running back through the engine's sump to a differential at the rear. Although originally planned as a 5 litres (1.1 imp gal; 1.3 US gal) powerplant, the first production cars used the Lamborghini Miura's 4-liter engine. Later advances increased the displacement to 4754 cc and then (in the "Quattrovalvole" model) 5167 cc with four valves per cylinder.
All Lamborghini Countaches were equipped with six Weber carburetors until the arrival of the 5000QV model, at which time the car became available in America, and used Bosch K-Jetronic fuel injection. The European models, however, continued to use the carburetors (producing more power than fuel-injected cars) until the arrival of the Lamborghini Diablo, which replaced the Countach.