BMW is working on a new, radical plug-in hybrid concept, which could be one of the most efficient cars ever .
All information on the project is unofficial right now, but most of it sounds reasonable.
"A secret new high-tech BMW prototype has been unveiled precipitately in a series of patent register images, providing clues to developments future models from the German car maker's fledgling i brand are likely to adopt.
The leaked images, lodged by BMW officials at the Shanghai patent register office in China earlier this year, reveal a new wind-cheating plug-in petrol-electric hybrid research vehicle that was constructed at BMW’s R&D centre in Munich, Germany, and has recently pressed into a testing program."
According to Autocar, who seems to have insiders at BMW, the German company is developing something special, something similar to the Volkswagen XL1.
The secret car is to be a four-seater with weight below 1150 kg (2,535 lbs) thanks to use CFRP. That's less than the BMW i3. Aerodynamic shape and wheels, as well as mirrors replaced by cameras, brings the drag coefficient down to an ultra low level.
1.0-litre twin-cylinder petrol engine is apparently used in the front, while an electric motor sits out back. 0-100 km/h (62 mph) in under 7 seconds and a top speed of 112 mph (180 km/h) were also mentioned. Battery cells are to be more energy dense than what's currently used today.