BMW M12

BMW M12/13 engine
Overview
Manufacturer	BMW
Production	1982–1987
Layout
Configuration	180° I-4
Displacement	1.5 L (1,499.8 cc)
Cylinder bore	89.2 mm (3.5 in)
Piston stroke	60 mm (2.4 in)
Compression ratio	7.5:1[1]
Combustion
Turbocharger	KKK[2]
Fuel system	Electronic fuel injection
Fuel type	Gasoline
Cooling system	Water-cooled
Output
Power output	300–1,681 bhp (224–1,254 kW; 304–1,704 PS)[3]
Torque output	175–1,130 lb⋅ft (237–1,532 N⋅m)
Dimensions
Dry weight	45–70 kg (99.2–154.3 lb)[4]
Chronology
Successor	BMW E41 / P80 engine

The BMW M12/13 turbo was a 1,499.8 cc four-cylinder turbocharged Formula One engine, based on the standard BMW M10 engine introduced in 1961, and powered the F1 cars of Brabham, Arrows and Benetton. Nelson Piquet won the FIA Formula One Drivers' Championship in 1983 driving a Brabham powered by the BMW M12/13 turbo. It was the first Drivers' Championship to be won using a turbocharged engine. The engine also powered the BMW GTP and in the 2.0-litre naturally-aspirated form, the successful March Engineering Formula Two cars. BMW engineers estimated the engine produced around 1,400 hp at maximum boost, however the BMW engine dynamometer could not go beyond 1,280 bhp.^[5][6][7][8]