The BMW E30 M3 is a high-performance version of the BMW 3 Series compact car, developed by BMW’s in-house motorsport division, BMW M. It was created between 1986 and 1991. The BMW S14 engine, a four-cylinder unit with high revs that delivered 238 horsepower in its penultimate incarnation, was used in the E30 M3. The E30 M3 was created as a homologation-only model for Group A Touring Car competition.
The E30 M3, E30 320iS, and E36 320i Super Touring all featured the DOHC four-cylinder BMW S14 engine. It is built using a two-cylinder-reduced six-cylinder BMW S38 cylinder head and the BMW M10 block.
The Sport Evolution (also known as the Evo 3) has an S14 engine that was the largest and most potent S14 ever developed. The engine's bore and stroke were increased to 95 x 87 mm (3.74 x 3.42 in), which increased the displacement to 2.5 liters. In road-legal form, it could generate 235 horsepower, and in race mode, 374 horsepower.
In 1985, the BMW M3 (E30) was unveiled to the world at the Frankfurt international auto show. The German Touring Car Championship (DTM) homologation was its main purpose. BMW Motorsport GmbH launched the last phase of the original M3 in 1990, increasing the displacement to 2.5 liters and producing 238 horsepower in the M3 Sport Evolution, the most potent version of BMW's E30 3 Series.
In-house BMW designer Claus Luthe worked with the Motorsport division to create the BMW E30 M3. The BMW S14 engine provided the vehicle's powertrain, which was built on the E30 platform. Paul Bracq created the E30 M3's body, which was manufactured at BMW's Regensburg plant.