BMW's i3 is built from the ground up, not a conversion. It is a rear-wheel-drive, four-seat hatchback with a pair of rear-hinged back doors. The electric drive produces the equivalent of 170 hp. An optional two-cylinder engine acts as a generator to extend the range beyond the 72 miles, to about 150 total. Charge times are 4.5 hours on 240-volt circuit, through the 7.4-kW onboard charger. The car uses an aluminum frame and carbon fiber structure to reduce weight. Despite its tall stance the car is very agile. It feels quick and easy to maneuver. The pronounced deceleration when lifting off the gas pedal takes some getting used to. 2017 brought a larger 94 amp-hour battery (up from 60 amp-hour) and models with the range extender engine got a slightly bigger fuel tank, now up to 2.4 gallons. In 2019, the battery grew again, as did the range--which is now up to 153 miles. Despite its tall stance the car is very agile. It feels quick and easy to maneuver, but the ride is rather stiff.