The 2014 Alpina B6 GranCoupe BiTurbo has been spotted once again, this time around the Nürburgring and in front of the BMW test center.

The 2014 Alpina B6 GranCoupe BiTurbo has been spotted once again, this time around the Nürburgring and in front of the BMW test center.

Riding on Alpina’s traditional multi-spoke alloys, the two prototypes seen testing are based on the 650i which has a V8 4.4-liter twin-turbo engine outputting 450 HP (330 kW) and 650 Nm (479 lb-ft). Output is expected to increase by 100 HP (73 kW) to 550 HP (404 kW).

Aside from the power bump, Alpina's version of the 6-Series GranCoupe will also receive a new front bumper, double exhaust on each side, rear spoiler and a redesigned rear bumper with diffuser. Brakes and suspension will also be going through a revision, along with the interior cabin which should receive the typical Alpina treatment which isn't very obtrusive.

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