BMW N40
The BMW N40 is a DOHC four-cylinder petrol engine which replaced the 1.6 litre versions of the BMW M43. It was produced from 2001-2004 and only sold in several countries, where taxes favoured cars with smaller displacement engines. The N40 was replaced by the BMW N45.Design
The N40 is based on the BMW N42 engine and uses the same crankcase, pistons and bore size of. The redline is 6,500 rpm.
Unlike the N42, the N40 does not have Valvetronic. The other major difference is a reduction in stroke to, which results in the smaller displacement than the N40.Versions
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