We have seen camouflage prototypes from the 8 Series BMW that are preparing to fight the Porsche Panamera. This, however, is by far the most revealing display, because this prototype was photographed sitting on a transport truck mostly without camouflage apart from a few layers applied to the rear fenders and trunk lid.
Not surprisingly, the front fascia looks very similar to the 8 Series Coupe with its sleek headlamps and wide grille, while its profile maintains the coupe's brother's sharp design lines. However, the body has been stretched from the A pillar to create a more even roofline and provide room for two additional doors while creating more rear space for rear passengers. The result is a sedan that looks very slim. Judging from the bumper, we seem to see a more sporty M850i model.