Description BMW M20B25 Engine – 2.5L Inline-6 for E28 5 Series The BMW M20B25 engine is a 2.5-liter inline-6 petrol engine from the iconic M20 family, fitted in the legendary BMW E28 5 Series and later E30 and E34 models. Produced from 1985 to 1992, the M20B25 is cherished for its smooth power delivery, bulletproof design, and mechanical simplicity. This engine features a single overhead camshaft (SOHC) design with 12 valves, Bosch Motronic fuel injection, and a cast-iron block with an aluminum head. It produces around 170 horsepower and 222 Nm of torque, delivering excellent mid-range performance and a spirited driving feel that defined the classic BMW driving experience. Perfect for vintage restorations or engine swaps, the M20B25 remains a favorite among enthusiasts for its reliability, tunability, and nostalgic charm. Key Specifications: Engine Code: M20B25 Displacement: 2.5L (2494cc) Configuration: Inline-6, SOHC, 12-valve Fuel Type: Petrol Fuel System: Bosch Motronic Power Output: 170 HP / 222 Nm Applications: BMW E28 525i, E30 325i, E34 525i All engines are compression-tested, cleaned, and come with a startup warranty. Optional extras such as the ECU, wiring harness, intake manifold, and exhaust components are available on request. We offer fast and secure worldwide delivery. Bring classic BMW performance back to life with the M20B25 engine—the heart of the E28 and a true symbol of the brand’s engineering legacy.
