Ann Arbor, Michigan -"Are you good?" asks my girlfriend. I nod, even though there's just one mile of cruising range left. Wait, scratch that -- zero miles. "Are you sure?" she continues. I nod again, and then the gauge goes blank. About an hour after I ran the battery packs down and the range-extending engine switched on, the 2014 BMW i3's two-gallon fuel tank has gone dry. Range anxiety in a range-extended EV, how about that?
This is an emergency
A range extender in an EV isn't strictly speaking an emergency device, but it's there mostly for emergencies. A little engine meekly churns and burns, and it sends a charge to the electric vehicle's battery packs. So with a full charge, a full fuel tank, and some foresight, a range-extended EV will never leave you on the side of the road looking for an electrical outlet.
But what happens when your battery packs are drained, your fuel tank is empty, and you have hundreds of miles to go but no time for a charge? What happens when you need a range-extended electric vehicle with a 0.6-liter inline-two engine and a tiny gas tank to perform like a regular car? What happens when you have one afternoon to travel from Detroit to Chicago in a range-extended 2014 BMW i3?
Hipsters make velour cool again
Today, we look like well-off hipsters. My cat is standing on the back seats, poking her head out of my window, while my girlfriend and I are both wearing all-gray outfits that regrettably match. We're badgering each other about obscure indie rock as we motor down the highway in this 2014 BMW i3, the hippest urban commuter you can buy.
The drive from Detroit to Chicago is a little less than 300 miles, and most cars make it without needing a top-off stop for the fuel tank. With a full charge and a full tank of gas, the BMW i3 says it has about 120 miles of combined range -- half from the batteries, half from the 38-hp, two-cylinder range-extender -- so it won't make it even halfway before needing fuel.
We're blissfully crawling through rush-hour traffic, gliding slowly and silently along in the slow lane. With its windows up, the i3 is crypt quiet (except for the obscure indie rock coming through the $800 Harman/Kardon audio system, of course). We can easily have a conversation, which is centered mostly around the i3's eccentric and ecofriendly interior, as the dashboard is trimmed in open-pore eucalyptus wood, the wool cloth of the seat upholstery is trimmed in olive green leaf-tanned leather, and the floormats are velour.








