2013 BMW 6 Series Gran Coupe spy shots

It's funny; of the three German luxury brands, BMW was the first to offer a sport-utility vehicle – the X5 – and yet it's the last to create some sort of four-door coupe, the next hot segment that every luxury marque seems to be diving into. Mercedes-Benz is now on its second generation of the CLS, the sexy Audi A7 is now on sale around the globe, and even Porsche took notice and created the Panamera. Nevertheless, BMW is quickly prepping its own take on the four-door coupe with this, the 6 Series Gran Coupe, which – based on this latest set of spy photos – looks to be nearing completion.

Not surprisingly, the 6 Series Gran Coupe will share its turbocharged six- and eight-cylinder engines with the 5 and 7 Series lineup, likely launching in 650i guise first with BMW's 4.4-liter twin-turbocharged V8. Don't be surprised if the production car debuts at the Frankfurt Motor Show this fall.