Parkers overall rating: 4 out of 5 4.0

The M6 Gran Coupe’s cabin feels appropriately expensive, with carbon fibre trim across the transmission tunnel and centre console, thick leather upholstery upon the seats and dark Alcantara headlining for the roof and windscreen pillars, all of which feels of very high quality. Stitching on the steering wheel in blue and red (the BMW ‘M’ colour scheme) is a nice touch, too.

There’s an enormous range of electrical adjustment for the driver’s seat and the driving position is low enough to remind you you’re driving something a bit special.

You’re constantly reminded that the Gran Coupe is a wide car – everything in the cabin is wide, from the transmission tunnel to the stereo fascia and even the driver’s footwell. While most automatic cars feature an extra-wide brake pedal, the Gran Coupe’s left pedal is resolutely normal-sized so there’s acres of space for your left foot.

Given its extra size, BMW M6 Gran Coupe comfort levels can be considered greater than the regular M6 Coupe. Rear passengers enjoy plenty of leg room while rear headroom is also very good by coupe standards. They also get their own set of air-conditioning vents.

This is very much a driver’s car though, and the driver’s seat features a huge range of adjustment, all controlled via electric motors. The Gran Coupe’s ride quality has a wide range of adjustment too, with three settings for the standard-fit adaptive dampers: Comfort, Sport and Sport Plus.

It deals with large bumps well in the softest Comfort mode but you’re always very much aware that you’re driving a car with enormously wide, low-profile tyres which thunk over cats eyes and pull at cambers in the road.

While the Gran Coupe is a car that can play the role of a relaxed GT if you want it to, you’ll need to be restrained with your right foot. The merest prod of the throttle pedal is a reminder that this is a car with a more frantic character just below the surface.