![2017 BMW i3 REx range-extended electric car [photo: Chris Neff]](https://images.hgmsites.net/tmb/2017-bmw-i3-rex-range-extended-electric-car-photo-chris-neff_100622577_t.gif)
When the history of modern electric cars is written, the BMW i3 will likely go down as something of an anomaly. Its carbon-fiber-reinforced plastic body shell, aluminum underpinnings, and battery-electric powertrain with an optional range extender are a combination not offered by any other maker, now or perhaps ever. We spent four days and 316...