The BMW i3 is a purpose built electric vehicle intended to appeal to urban customers. The i3 is a four-passenger model with a hatchback. Access to the rear seat is provided by two rear-hinged access doors. The rear-mounted electric is rated at 170-bhp and drives the rear wheels. BMW estimates that the 22 kWh lithium-ion battery pack gives the i3 an 80-100 mile driving range. A full recharge at 220V requires 3 hours. For drivers that worry about the electric driving range, the i3 is available with a 34-bhp 650cc two-cylinder gasoline range extender engine. The range extender is used to provide electricity and does not drive the wheels. The i3 has a uniquely styled interior with upright seating.