BMW has always hinted at the possibility of adding a range-extending engine to the i3 and the company's head of research and development has just confirmed it.

BMW has always hinted at the possibility of adding a range-extending engine to the i3 and the company's head of research and development has just confirmed it.

Speaking to Automotive News, Herbert Diess said the model will have a two-cylinder motorcycle engine which will act as a generator to recharge the car's batteries. This should enable the model to have a range of 250 miles (402 km) which is a huge improvement over the standard i3 which can only travel up to 100 miles (160 km).

Diess expects the range-extending engine will account for more than 50 percent of i3s sales at launch, but eventually stabilize at roughly 20 percent. As he explained "I imagine many buyers will order the range extender to cure their range anxiety, discovering later they need it very seldom."

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