BMW i3 REx range extender: owner assesses pros and cons of limited-power engine

The BMW i3 electric car may be the most ambitious small car of recent years, bristling with new technology and innovation. Its carbon-fiber reinforced plastic body shell rides on an aluminum platform, and its all-electric powertrain may include an optional small engine. The battery-electric i3 also happens to be the most energy-efficient vehicle… …read more