Just like the new 7-series, the next 6-series is a gently reheated evolution of the first-generation styling philosophy. There will be no rabbit hatch bootlid, no crying-eyes headlamps, no jaw-dropping bumpers. To fix the slightly odd proportions, BMW designers will shorten the overhangs and extend the wheelbase by 80mm.
The nose will be shortened by 40mm and the roofline will be lowered slightly. The overall effect will – on the finished production car – produce a sportier and more aggressive stance.

[Source: Car Magazine]