The very first BMW M3 was based on the 1986 model year E30 3-Series, with a 2.3 liter I4 engine and ever since then the M3 has been of the BMW’s most successful projects, also setting new standards for those involved in the automotive industry.
The BMW E30 M3 was different from the rest of the E30 line-up, starting with the fact that it was equipped with a revised stiffer and more aerodynamic body shell, but “box flared” fenders to accommodate a wider track with wider and taller wheels and tires as well. The body panels that the standard model BMW 3-Series and the BMW M3 had in common were the hood and roof.
The BMW 3-Series had three times the caster angle of a BMW E30. The BMW M3 also had a Getraf 265/5 5 speed gearbox and rear differential with different final drive ratio and 25% lockup.
A member of TeamSpeed.com created a BMW E30 M3 restoration project, so take a look: