BMW has unveiled a concept four-door ‘Gran Turismo’ coupe that looks set to target arch-rival Mercedes’ CLS.

But mechanical specification suggests the Porsche Panamera is also in its sights, It is built on a stretched 5-series platform with the M5’s V10 engine.

A wordy press release described the car as a “modern interpretation of the premium concept ensured by extreme precision in every design detail, choice of the most refined materials, and perfect craftsmanship” and a “previously unseen combination of vehicle dimensions and weight ensured by consistent implementation of lightweight strategies”.

The car has a low roof line and centre of gravity, an “extremely” long wheelbase and an innovative interior design with layered surfaces.

It carries four passengers in supportive individual sports seats.

The headlights use LED reverse projection technology and slender rear lights are mounted behind clear glass.

The cabin’s ‘layer design concept’ is also applied to the design of the double circular dials to provide clearly structured information on several visual levels.

BMW has also introduced ceramics as the material for the controls and instruments.