BMW is busy working with a Megacity electric four seater, which will go on sale in 2013. Ian Robertson, BMW’s sales and marketing boss, said in an interview with AutoCar that the car will be available in more variants, including a sports car version. This could be inspired by the Vision ED sports car concept that unveiled at the Frankfurt Motor Show, but a duplication of it, according to Robertson.

The engine from the Vision Efficient Dynamic will be used if not the version of it is used. The Vision ED sportscar is powered by a three-cylinder turbodiesel engine combined with two electric motors, producing 356 hp and a peak torque of 590 lb-ft. It hits a top speed of 155mph and makes the 0-60mph sprint in 4.8 seconds. Fuel consumption is reduced to 75.1 mpg imp, while CO2 emissions are just 99 grams/km.

Stopping the airing rumors, Ian confirmed that the new model will wear the BMW badge and won’t be sold out under a separate brand; saying wants to have a strong sub-brand like M.

Main focus with the future Megacity model will be weight saving and to do that BMW will build it principally from carbon fiber. Using carbon fiber will allow for about a 30% reduction in weight from that of an aluminum car. However, if you were hoping for an inexpensive model, you can pretty much forget about it.