The 2014 Porsche Panamera has leaked to the web ahead of its debut at the Shanghai Motor Show.

The 2014 Porsche Panamera has been leaked to the web thanks to a little embargo breaking by Autocar.

Looking instantly recognizable, the facelifted model adopts a new front fascia with restyled headlights. We can also see a revised rear end with a modified bumper and revised taillights.

The big news is the addition of a Panamera S E-Hybrid that features a 3.0-liter V6 engine, an electric motor and a lithium-ion battery pack. This setup will reportedly enable the model to have a combined output of 410 bhp (306 kW) which should allow the hatchback to accelerate from 0-60 mph in 5.5 seconds and hit a top speed of 167 mph (269 km/h).

More importantly, by utilizing plug-in hybrid technology, the model is expected to return up to 91 mpg UK (3.1 L/100km / 75.7 mpg US) with CO2 emissions of less than 100g/km. In order to achieve this, the electric motor will power the car for 11-22 miles (18-35 km) at speeds up to 83 mph (133 km/h).

The Panamera S is also slated to adopt a new twin-turbo 3.0-liter V6 engine that develops 413 bhp (308 kW) and 385 lb-ft (521 Nm) of torque - an increase of 19 bhp (14 kW) and 14 lb-ft (19 Nm). The change is expected to boost fuel economy by up to 18 percent.

The 2014 Porsche Panamera will be unveiled shortly, so stay tuned for full details.

2014 Porsche Panamera & Panamera E-Hybrid leaked