Priced from $299,500, the M6 GC is around $7000 dearer than the M6 Coupe and $9000 less than the M6 Convertible.
BMW believes the latest addition to its M Division will appeal to buyers as the perfect performance all-rounder.
“It’s a perfect combination of high-performance sports car and luxury four-door coupe” BMW M Division’s Jorg Bartels said. "You don’t have to have a thoroughbred Ferrari anymore.”
Power comes from a 4.4 litre, twin-turbo V8 producing 412kW and 680Nm of torque. This is the same unit found in the other M6 models.
Importantly, the V8 has 30 percent more torque than the V10 unit used in previous M6 models.
And, for another $12,000, you can add 11kW of power through a performance package option. The pack also includes lower suspension, stiffer dampers and a modified exhaust.
A seven-speed dual-clutch transmission is the only one on offer with power being sent to the rear wheels via BMW's Drivelogic system and Active M differential.
BMW claims the M6 Gran Coupe can complete the 0-100km/h run in just 4.2 seconds, while fuel consumption will match a six-cylinder Ford Falcon at 9.9 lt/100km.
The Falcon, of course, doesn’t have the weight saving features of the M6 Gran Coupe, such as a carbon-fibre roof and a stop/start system. The M6 Gran Coupe also requires 98 octane fuel to achieve that figure.
Braking is taken care of by six-piston fixed calipers up front along with massive 400mm vented floating discs.
Rear brakes are floating single-pot calipers and 396mm vented discs. The huge rotors require 20 inch alloy wheels to contain them.
Ceramic brakes are a $24,500 option that will reduce un-sprung weight by 20 percent. BMW claims that these discs should last the life of the vehicle as long as drivers don’t subject them to the rigours of track days.
The M-tuned suspension on the M6 Gran Coupe features a Dynamic Damper Control system and is more ridged than the lighter M6 Coupe, 15 percent more actually.
The cabin is trimmed in leather throughout along with Alcantara and carbon-fibre accents. Being a four-door, the M6 Gran Coupe is the only M6 with dual-zone climate control (naturally).
The front M Sport seats have heating and cooling ventilation, and there’s a familiar M steering wheel and instrument cluster. BMW’s iDrive control system is capable of sharing internet services and is paired with a 10.2 inch colour display.
Other interior features include 60/40 split folding rear seats along with a roller sunblind.
Safety features include six airbags, active cruise control, a speed limiter and active headrests for front seats
The M6 Gran Coupe also gets M Dynamic Mode, allowing the driver to adjust suspension, steering and throttle settings along with launch control. The driver can also opt to switch all the electronic aids off.
An unusual safety feature for the M6 Gran Coupe comes courtesy of a free advanced driving course.
The M6 Gran Coupe is longer and heavier than the M6 Coupe, stretching 113mm over the two-door for a total length of 5011mm. Height is 1374mm and width measures 1899mm.
Despite the weight saving features - like the carbon-fibre roof - it weighs 100kg more at 1950kg.
The M6 Gran Coupe has an 80 litre fuel tank.
PRICING (excludes on-road costs)
- BMW M6 Coupé - $292,500
- BMW M6 Gran Coupé - $299,500
- BMW M6 Convertible - $308,500
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