The BMW M20 is a SOHC straight-six petrol engine which was produced from 1977 to 1993. It was introduced eight years after the larger BMW M30 straight-six engine, which remained in production alongside the M20.

Nov 2, 2021 · The BMW M20 is an inline-six, single overhead camshaft engine that was produced from 1977 to 1993. The M20 powered multiple BMWs, but it went down in history as the unit that powered the iconic E30 3-series.

Mar 19, 2022 · Without as many moving parts or complicated electrical components, M20s are great engines to learn engine maintenance skills for beginners. In this guide, we’ll cover some of the main things that make the M20 such a staple piece in BMW’s straight-6 catalog.

The M20 is an straight-6 piston engine of BMW, whose 12-valve, belt-driven SOHC design in three parts, featuring a main Block with a Sump at the bottom and a Head at the top. If you want help fitting one of these beasts to your car, learn more about the M20 Engine Swap.

5 days ago · The BMW M20B25 is a 2.5 liters (2,494 cc, 152.19 cu-in) straight-six, four-stroke cycle natural aspirated gasoline engine from BMW M20-family. The engine was manufactured on Munich Plant (Munich, Germany) since 1985 to 1991.

Mar 26, 2025 · The BMW M20 engine, while generally reliable, is not without its share of problems. Understanding these issues is essential for current and prospective owners. Below are some of the most common problems associated with the M20 engine, along with their potential causes and solutions.

Feb 3, 2025 · Explore common BMW M20 engine problems, their symptoms, and consequences to keep your vehicle running smoothly and reliably.

Dec 18, 2024 · The latest engine is the M20B27, which has this figure closer to three (2.7 liters). Then German engineers used this engine to produce the M21 series of diesel units. Maximum torque, N*m (kg*m) at rpm. In-line, 6-cylinder, injector. Maximum power, hp (kW) at rpm. The largest power unit is more tractive at low rpm.

Mar 19, 2024 · Introduced in the early 1970s, this inline-six engine has powered numerous iconic BMW models, delivering a perfect blend of performance and reliability. Let’s dive into its key features and specifications. The M20 engine boasts an inline-six configuration, with displacement ranging from 2.0 to 2.7 liters, depending on the variant.

Apr 19, 2024 · In-line six-cylinder engine BMW M20B25 (popularly known as “Spider”) was developed on the basis of low-volume six M20B20 in 1986 and together with the base unit and motors M20B23, M20B27, is part of the BMW M20 family. This engine was used on BMW cars with the index 25i.