In electric cars, what counts is how far you can go on a single charge, and the range numbers that are displayed on the instrument panel usually can't be duplicated in the real world. Tesla says the Model S can travel up to 300 with a beefy battery. But an Edmunds.com tester discovered he burned up 251 miles of indicated range after covering just 121 miles, which made his ride home a bit uncomfortable.The i3 will have an optional range extender, a motorcycle-like gasoline engine that can power the car for 186 miles, BMW says, which should prevent embarrassing roadside breakdowns. Otherwise, the car is said to be able to travel about half that distance, 93 miles, on a single charge. But we won't know for sure until the cars are actually on the road.
Advantage: tie