Powered by a new 3.0-litre V6 and an electric motor, the Panamera E-Hybrid has the addition of plug-in charging of its lithium-ion battery pack that is tipped to drop the CO2 output significantly below the current hybrid’s figure, which is 159g/km.
The fuel economy of the new E-Hybrid is said to be 56 per cent better than the old car. Although Porsche is not yet making public its CO2 figure, the Paris show Sport Turismo concept previewed the new powertrain and claimed 80mpg and 82g/km of CO2.
Despite these impressive green numbers, Porsche says the Panamera S E-Hybrid is still capable of 167mph flat out and 0-60mph in 5.2sec, which is over half a second quicker than the old hybrid.
The E-Hybrid’s 3.0-litre V6 is said to be “entirely new”, although further detail on what that means precisely was unavailable.
Pairing a 94bhp electric motor with the 316bhp V6, the new hybrid features a 9.4kWh battery pack — with five times more capacity than the outgoing hybrid’s. The E-Hybrid will use an eight-speed Tiptronic S automatic while the normal models will use Porsche's seven-speed PDK.
On electric power alone, the E-Hybrid is said to be capable of 83mph and have a realistic range of 11 to 22 miles, although the latter is only likely in highly favourable conditions. Additional features include a high-speed electric coasting mode and an app that allows owners to preheat or cool the car remotely.
Its green powertrain is one of several significant advances that will be announced alongside the facelifted Panamera at the Shanghai motor show later in April.
A new twin-turbocharged 3.0-litre V6 petrol engine replaces the naturally aspirated 4.8-litre V8 in the Panamera S and 4S. Power is up by 19bhp to 413bhp and torque by 14lb ft to 385lb ft, while fuel economy is said to be improved by a significant 18 per cent.
As uncovered by Autocar last week, much of the focus of the revised Panamera is aimed at smoothing the styling of the rear end. Changes include a wider rear window and pop-up spoiler. Another noticeable tweak is the relocation of the number plate from the rear bodywork to the new bumper, which tidies up the look of the back end.
The changes aren't restricted to the rear of the car, however. The front-end styling has been subtly tweaked, with a more prominent and tighter design, larger front air intakes and optional full-LED headlights.
Other new additions to the Panamera range include a pair of 'Executive' models, available in 4S and Turbo specification. These feature a 15cm longer wheelbase, increasing rear passenger space. All Executive models come with adaptive air suspension as standard.