The four-door coupe is a trend that only seems to be growing. Mercedes, of course, was the first (and remains the only) company to get one on the market with the CLS. Volkswagen and Audi are working on their own. Porsche's upcoming Panamera will take a similar approach. Aston Martin showed us its Rapide concept. Even Bugatti is rumored to be considering an exclusive four-door coupe as a follow-up to the Veyron. Now BMW is next in line.

BMW is said to have abandoned the idea of rear-hinged "suicide" doors in the back (like they put on the Rolls Royce Phantom) in favor of conventional doors. Previous reports speculated that, based on test mules seen running around the Nurburgring, BMW's new model would take more of a crossover/SUV shape, melding an M6 with an X5, though more recent reports suggest it will be more sedan/coupe-like.

Insiders predict the BMW four-door coupe will hit the market as a 2009 model.

[Source: The Car Connection]