The Panamera is a 4 door with the looks of the Cayenne but more streamlined. It is rumoured to be rear wheel drive with either a modified Cayenne 4.5 V8 or 3.6 V6 engine.
The development of this concept vehicle has cost 1.2 billion USD, sales are expected to be around 20,000 cars a year.
Bugatti concept car in the making 'Lydia'
Bugatti 'Project Lydia,
Originally this car was supposed to be a supercar faster and more costly than the Veyron, however allegedly this concept had been axed, and a 4 door Bugatti supercar is on the cards, watch this space... some Veyron and possible designs to be going on with