JK's Galleria of Vintage, lassic and Pristine Cars is honored to present a most breathtaking example of pure vehicle design decadence...this is the vehicle of dreams! 2015 BMW 6 Series Gran Coupe Sedan Review & Ratings | Edmunds Powering the 2015 BMW 640i Gran Coupe is a turbocharged 3.0-liter inline six-cylinder engine that makes 315 hp and 330 pound-feet of torque. Fuel economy for the rear-wheel-drive 640i is 24 mpg combined (20 city/31 highway). The all-wheel-drive 640i xDrive is just marginally thirstier at 23 mpg combined (20 city/29 highway). Edmunds instrumented testing recorded a 5.7-second 0-60 time in the rear-drive 640i Gran Coupe, hich is average for this class of car. Also remember we can facilitate shipping right to your door. We also take anything of value on trade and can obtain financing with almost new car rates and terms up to 120 months!! What that means is the car of your dreams can very easily turn into a reality!