Earlier this summer AC Schnitzer launched a new tuning program for the BMW M6 Gran Coupe.
In standard form, the M6 GC packs the S63Tü high-revving V8 engine with M TwinPower Turbo technology that produces 412 kW/560 hp and 680 Newton metres (502 lb-ft) on tap between 1,500 and 5,750 rpm, while maximum output is developed between 6,000 and 7,000 rpm. The engine is matted to a 7-speed M Double Clutch Transmission with Drivelogic.
But the Aachen-based tuner gave the M6 Gran Coupe a significant speed bump: 665 HP / 652 LB-FT.
The 329 km/h speed was achieved at the Vmax test of Auto Bild Sportscars and Continental on the high-speed oval in Nardo, southern Italy.