What is bmw m 40?

The BMW M40 engine is a 4-cylinder petrol engine that was produced by BMW from 1987 to 1995. It was used in a variety of models, including the E30 318i, E36 318i, and E34 518i. The M40 engine has a displacement of 1.8 liters (1,796 cc), and produces between 89 and 140 horsepower, depending on the model. It uses a single overhead camshaft design, and is able to achieve decent fuel economy while still providing good power output. The M40 engine is known for its reliability and longevity, and is a popular choice for enthusiasts who are looking to modify and tune their cars. Overall, the BMW M40 engine is a well-designed, reliable, and efficient powerplant that has provided many years of service to BMW owners around the world.