New 2013 BMW 6 Series Gran Coupe features upgraded engines, suite of EnergyDynamics technologies; ECO PRO mode
Green Car Congress
DECEMBER 11, 2011
The BMW 6 Series Gran Coupe will be offered as three distinct models in the USA. BMW fine-tuned the inline 6-cylinder engine (N55HP) in the new BMW 640i Gran Coupe. BMW engineers extracted additional performance from the engine while maintaining its fuel efficiency. Top speed is electronically limited to 155 mph.
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