At the BMW press launch of the new 650i Convertible, BMW officials stated that a six-cylinder options for the 6 Series family is a normal step for the company, as seen with the 7 Series products, but a timeline was not provided at the moment.
The launch date for the new 6 Series Coupe was set for October 1 and according to Autoblog, a 640i Coupe model will be offered as well. The 640i Coupe uses the 3.0 liter N55 twin-scroll turbocharged engine which outputs 315 horsepower and 332 lb-ft of torque. The engine is mated to the 8-speed ZF transmission.