Category: BMW

The BMW E12 520/6, which had a 2-liter M20B20 modification, was the first vehicle with an M20 engine. The piston stroke is 66 mm, and the cylinder diameter is 80 mm. In 1982, a BMW 520i was the first vehicle to use an M20B20 engine with a Bosch L-Jetronic injector. A Bosch Motronic catalytic converter […]

The 2.5-liter M20B25 engine does not have a catalytic converter. When it was first introduced, it had a carburetor; later, Bosch added a fuel injection system. Bosch Motronic 1.1/1.3 was the engine management system. The capacity was raised after the B25 was upgraded in 1987. A catalyzed model with Motronic 1.3 engine management debuted in […]

The 3.0-liter (2986 cc) M30 engine is known as the M30B30. The Bosch D-Jetronic mechanical fuel injection system was the first fuel-injected version of the 2,986 cc (182.2 cu in) M30, which made its debut in the E9 3.0 CSi in 1971. Bosch L-Jetronic electronic fuel injection replaced the previous fuel injection system in 1976. […]

The M30B35LE is a SOHC, two-valve, lower efficiency variant of the M88/1 engine, commonly referred to as the M90. The cylinder head is taken from the BMW M30 engine family, but it shares the same block, bore, and stroke as the M88. This engine has used both Bosch Motronic and Bosch L-Jetronic engine management systems […]

The M30B34 engines with a 10.0:1 compression ratio and 160 kW (218 horsepower) were sold in Europe and the majority of other markets. The M30B34 produced 136 kW (185 hp) and had an 8.0:1 compression ratio in North America and Japan. The Bosch Motronic digital fuel injection system was used in every market. The stroke […]

In 1990, the M50B20 engine—the smallest inline 6-cylinder engine in the BMW M50 series, which also included the M50B24, M50B25, S50B30, and S50B32—was introduced to replace the outdated M20B20. This new cast-iron cylinder block has oil nozzles; the height has changed to 210 mm, but the inter-cylinder distance is still 91 mm. This block contains […]

In 1990, BMW replaced its inline 6-cylinder M20B25 engine with a new, far more potent and sophisticated M50B25. The device is a member of the new M50 family, which also includes the M50B20, M50B24, S50B30, and S50B32. The cylinder head is the primary distinction between M50 and M20 engines. The new engine has 24 valves, […]

In 1994, the well-liked M50B20 engine was replaced by the M52B20. This is the first engine in the new M52 family of inline 6-cylinder engines, which also includes the M52B24, M52B25, M52B28, and S52B32. The new engine’s lightweight aluminum cylinder block has new pistons, connecting rods, and nickel-plated cylinders. The M52B20 connecting rod is 145 […]

Introduced in 1995, the BMW M52B25 engine from the M52 family (which also included the M52B20, M52B24, M52B28, and S52B32) was intended to replace the 2.5-liter M50 representative. The bottom’s geometry stayed the same, but the pistons and connecting rods were modified, and the cast-iron block was swapped out for a lightweight aluminum cylinder coated […]

The M52B28 engine, which debuted in 1995, is the senior member of the M52 family, which also consists of the M52B20, M52B24, M52B25, and S52B32. In North America, the engine block is made of cast iron; in Europe, it is made of nickel-plated aluminum. The engine’s dimensions are square (84 x 84 mm), the cylinder […]