BMW has lifted the wraps on the latest Coupe, Convertible and Gran Coupe variants at the same time - with prices ranging from £59,430, while the fiery M6 models will cost up to £97,300.

Though the revisions are subtle rather than radical, the effects are far-reaching when it comes to efficiency and comfort.

It means 6 Series fans will get a more sporty and luxurious ambience courtesy of new trim materials, centre console surfaces and lighting, and there's also a more extensive range of standard and personalisation features.

For instance the company's ConnectedDrive navigation and infotainment package is fitted to every model and Concierge Services - accessed through an embedded SIM card - allow drivers to set up a bespoke supply of info.

All petrol models now have a sports exhaust system with a switchable valve which adds more rumble to the engine sound.

And aerodynamic improvements along with BMW EfficientDynamics technologies mean that both petrol and diesel six-cylinder models are more fuel-efficient than before.

Through features such as Dynamic Damper Control, Active Drive and Integral Active Steering, owners are now able to create a made-to-measure driving experience, while the latest BMW Head-Up Display and Driving Assistant Plus with Active Cruise Control minimise distractions and supplement the driver's reactions to improve safety.

BMW says that around 80,000 versions of the outgoing range have been sold globally in three years with the longer wheelbase Gran Coupe now claiming almost half of 6 Series sales.

All three body styles are available with a choice of TwinPower Turbo in-line six-cylinder and V8 engines driven through an eight-speed automatic gearbox.

The 3.0-litre 313bhp turbodiesel unit in the 640d models and the similar-capacity 320bhp petrol engine in 640i versions are now more fuel-efficient thanks to EfficientDynamics, resulting in CO2 emissions down to 139g/km on the 640d SE Coupe.

Yet every 6 Series can accelerate from 0-62mph in at least 5.5 seconds, appreciably less in the case of the 4.4-litre V8 bi-turbo 650i models and 560bhp M6.

As for styling the BMW kidney grille now features nine bars where previously it had 10 and there are also new LED headlights, fresh metallic paint colours and revisions to the interior.

Heading the new options list is Driving Assistant Plus - a camera and radar-based system which incorporates Active Cruise Control with Stop & Go, Lane Departure Warning and Pedestrian and Collision Warning with Braking.

It automatically maintains a safe gap to the car in front, alerts a 6 Series driver whose actions might cause a collision and, at up to 37mph, brakes the car to a standstill if there is a risk of an impact with a pedestrian.