e30m3 Engine :
The E30 M3 used the BMW S14 four-cylinder engine, a high-revving DOHC design with a head closely based on that of the BMW S38 six-cylinder engine, the block from the BMW M10 four-cylinder was used. In countries where the M3 was sold with a catalytic converter, the initial versions produced 143 kW (192 bhp) and had a top speed of 235 km/h (146 mph). In countries where a catalytic convertor was not required, the engine produced 149 kW (200 bhp).
In September 1989, European M3s were upgraded to the 158 kW (212 bhp) (as introduced on the Ravaglia special edition model), increasing the top speed to 240 km/h (149 mph).
BMW E30 :
The BMW E30 is the second generation of BMW 3 Series, which was produced from 1982-1994 and replaced the E21 3 Series.
The model range included coupé and convertible body styles, as well as being the first 3 Series to be produced in sedan and wagon/estate body styles. It was powered by four-cylinder petrol, six-cylinder petrol and six-cylinder diesel engines, the latter a first for the 3 Series. The E30 325iX model was the first 3 Series to have all-wheel drive.
The first BMW M3 model was built on the E30 platform and was powered by the high-revving BMW S14 four-cylinder petrol engine, which produced 175 kW (235 bhp) in its final European-only iteration. The BMW Z1 roadster was also based on the E30 platform.