These are the first spy shots with the upcoming BMW 6-Series GranCoupe prepared by Alpina.
After launching the 3-Series-based B3 and X3-based XD3 models in Geneva last month, Alpina is working on an upgrade program for the 6-Series GranCoupe which will be reportedly unveiled in September at the 2013 Frankfurt Motor Show.
Apparently they will use a 650i which in its standard form delivers 450 HP (330 kW) and 479 lb-ft (650 Nm) of torque from its twin-turbo, 4.4-liter V8 engine. As you would expect, the engine will be tweaked and is rumored to deliver around 540 HP (397 kW).
A few styling changes will also be implemented, especially to the front of the car, along with a quad exhaust, new wheels and a rear spoiler. Various Alpina-styled interior tweaks are also planned.