This is the Porsche Panamera Sport Turismo, a plug-in hybrid concept car revealed on the eve of the 2012 Paris motor show.
The Panamera Sport Turismo has a 328bhp 3.0-litre V6 engine combined with an electric motor to give a total power output of 411bhp. CO2 emissions are less than 82g/km, while Porsche claims the car could do an average of more than 80mpg.
The electric motor is powered by a lithium-ion battery pack and the concept car can drive at 80mph solely on electric power.
It has an electric-only range of nearly 19 miles and it completes the 0-62mph dash in less than six seconds.
The Panamera Sport Turismo can be plugged into the mains, and a full recharge takes less then three hours.
The car also has an 'e-charge' function, which intensifies the charging of the batteries while the car is using the petrol engine. Porsche claims this would be useful, for example, when one section of a journey is on the motorway where the batteries are recharged followed by a section of city driving that is completed in full electric mode, without any emissions.
Porsche says the Panamera Sport Turismo is how a Porsche sports car 'of tomorrow' could look. Like the Panamera, it has four seats and four doors. The concept estate car is slightly shorter than the Panamera, but is wider and taller. No details have been released yet on the size of the boot.
The concept car has its indicators and sidelights incorporated into a new headlight unit, while traditional door mirrors have been forsaken in favour of two cameras mounted in the side air vents, with two screens showing their images in the cabin.
A touch-screen in the cabin's centre console controls the car's various driving modes, the climate control, seat adjustment, lights, reversing camera and the car's communication functions.
Porsche says the Panamera Sport Turismo is strictly a concept car at the moment and won't comment on if the car will be built.