Click above for high-res gallery of the BMW Hydrogen 7

The BMW Hydrogen 7 arrived in late 2006 boasting the unique ability to run its V12 powerplant on both hydrogen and gasoline. This was a smart idea, as the on-board 30-gallon tank of -253° Centigrade liquid hydrogen was only good for a range of about 125 miles. The other fuel tank, filled with 19.5 gallons of good old-fashioned gasoline, extended the range another 310 miles. It didn't offer any environmental advantage, but it did allow you to get home.