http://www.bmwmregistry.com/model_faq.php?id=8 wrote:
What distinguishes an E30 M3 Cecotto?
In order to celebrate the many competition victories of factory driver Johnny Cecotto, BMW produced a speical version of the E30 M3 during 1989 that was named in his honor. This model introduced the 215-hp version of the 2.3-liter S14, still rated at 170 lb/ft of torque, though now at a slightly lower 4,600rpm. This engine, which would become standardized on European-spec M3s a few months later, can be identified on the Cecotto by its body-color cam cover.
All M3 Cecottos are painted Misano Red (236), Macao Blue metallic (250) or Nogaro Silver metallic (243) and carry the Evolution/Evolution II front and rear spoilers. They are further distinguished by their 7.5x16-inch wheels with special black centers. However, they do not include the Evolution's thinner glass or front brake ducts in place of foglights.
On the inside, the Cecotto has the usual M3 equipment including sport seats, though these are generally trimmed in a Anthracite or Silver M-Technic cloth with leather bolsters, a rare option on regular M3s. As an alternative, extended Black Bison leather, Black Nappa leather or Silver Nappa leather could be specified at extra cost. There are also special door sill plates with a color "M3" insignia and a plaque on the center console that displays Johnny Cecotto's signature as well as each car's exclusive number out of 505. (In fact, only 480 Cecottos were built, the other 25 being nearly identical Ravaglia editions see below).
What distinguishes an E30 M3 Ravaglia?
Instead of the E30 M3 Johnny Cecotto edition, the U.K. received only the E30 M3 Roberto Ravaglia edition, which was essentially an identical car except for the signature of another BMW factory race driver on the numbered plaque. Only 25 were built.