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.
BMW is following up the original Hydrogen 7 with a new version - this time minus the gasoline tank. While official performance specifications, including emissions data, have not been released, BMW is claiming both performance and range have been increased. It will debut at the 2008 National Hydrogen Association Conference and the 2008 SAE World Congress in mid-April, when BMW is expected to release emissions date for the car, as well.