BMW M40

The BMW M40 is an inline-four SOHC piston engine which replaced the M10 and was produced from 1987–1995. It uses a camshaft belt like the 6 cylinder M20. Displacement ranges from 1.6 L to 1.8 L. The direct successor was the M43, which uses a chain driven camshaft, however in 1989 BMW also released the M42, a higher performance DOHC four-cylinder engine with the same block dimensions as the 1.8 litre M40.

BMW M40

The BMW M40 is an inline-four SOHC piston engine which replaced the M10 and was produced from 1987–1995. It uses a camshaft belt like the 6 cylinder M20. Displacement ranges from 1.6 L to 1.8 L. The direct successor was the M43, which uses a chain driven camshaft, however in 1989 BMW also released the M42, a higher performance DOHC four-cylinder engine with the same block dimensions as the 1.8 litre M40.