The BMW 640i Gran Coupe is a luxury four-door coupe in the BMW 6 Series lineup. The 640i has a 3.0-liter turbocharged inline 6-cylinder engine that produces 315 horsepower and 330 lb-ft of torque. It comes with a standard 8-speed automatic transmission and all-wheel drive is an available option. Inside the 640i Gran Coupe is an upscale, tech-filled cabin with plenty of luxurious materials and features. It also comes with an impressive list of standard equipment, including BMW's iDrive infotainment system, navigation system, and advanced driver assistance features.