The world’s sportiest diesel engine is a 3.0-litre twin-turbo in-line six-cylinder unit producing 309bhp at 4,400rpm and 465lb ft of torque from only 1,500rpm with the help of variable geometry turbocharging.BMW’s ECO PRO mode, fitted as standard on both the 640d Coupé and the 640d Convertible, provides even more economical performance when driving at low speeds or when cruising. In this instance it allows the standard eight-speed automatic gearbox to shift up earlier while altering throttle sensitivity, engine mapping and the power consumed by electronic auxiliary systems.
The BMW 6 Series Coupé and Convertible will now be available in M Sport trim. The M Sport package adds the M aerodynamic bodystyling package, 19-inch M light alloy wheels, dark chrome exhaust tailpipes, High-gloss Shadowline exterior trim and black brake callipers. Inside Anthracite headlining, Aluminium Hexagon trim, Sport seats and M Sport multi-function leather rimmed steering wheel are fitted.
The BMW 640d Coupé costs from £62,080 while the 640d Convertible starts at £68,210.