Porsche saloon reveals all... or does it?

After months of spy shots and more recently an official teaser photo, could this image finally reveal the Porsche Panamera?

There’s no doubt the four-door shape is close to the real thing. The sleek nose, with its swept-back lights, resembles the 911’s, while the truncated rear sits low and squat.

The biggest question mark is over the detailing in the image. It doesn’t seem to feature the LED running lights from Porsche’s teaser shot, but adds an indicator repeater ahead of the front wheelarch not seen in the official image. The four-seat, front-engined Panamera sits on the same platform as the Cayenne and will share a version of the SUV’s 4.5-litre V8 powerplant.

Future engine developments will include a hybrid with an electric motor to boost power, plus a version of VW’s 3.6-litre V6. There are also suggestions that a V6 TDI diesel might arrive beyond 2010.

The Panamera’s price tag means it rivals high-end versions of the Mercedes S-Class and BMW 7-Series. It will also take aim at four-door supercars such as the Maserati Quattroporte, Lamborghini Estoque and Aston Martin Rapide.