Since then, Volkswagen countered with the CC, Porsche launched the Panamera, and Audi won us over with its A7. So what about BMW? Now that the big 6 Series coupe has taken hold, the German automaker has added a proper back seat and two additional doors to create this, the 2013 6 Series Gran Coupe.
The first version of the Gran Coupe to arrive Stateside will be the 640i, powered by BMW's N55 3.0-liter turbocharged inline six, good for 315 horsepower and 330 pound-feet of torque in this application. Shortly thereafter, the 650i Gran Coupe will arrive, available with rear-wheel drive or xDrive all-wheel drive, boasting a twin-turbocharged 4.4-liter V8 tuned to 445 hp and 480 lb-ft. Both engines are paired with BMW's ZF-sourced eight-speed automatic transmission.
Compared to its two-door counterpart, the Gran Coupe is a full 4.4 inches longer, and most of that added length benefits the rear passengers. BMW's literature states that the stretched 6 Series has a 4+1 seating configuration, meaning there's actually a quasi-usable seat between the two outboard rear positions. (Good luck.) Judging from the photos, the Gran Coupe's interior is as luxuriously appointed and tech-laden as the rest of the 6 Series range – if not a little bit moreso.
We originally thought that BMW would debut the 2013 6 Series Gran Coupe at next month's Detroit Auto Show, but since the all-new 2012 3 Series is expected to make its public debut at Cobo Hall, we think BMW may hold off on the official Gran Coupe introduction until the Geneva Motor Show in March.
