However, the E36 M3's racing career was short-lived because of regulation changes. The American market M3 also changed, and for the worse, because of an engine regulatory requirement. The car's engine was taken from a BMW 525i, bored out to 3.0-liters and generated modest a 244hp and a top speed of 137 mph. The launch of the four-door sedan variant was another stroke of genius, at least at a commercial level, since it made sense to thousands more customers to purchase an M3. In spring 1995, BMW M GmbH introduced M3 GT Coupe for homologation.