A Company from British, Riversimple, show a hydrogen car. The car is more economical than the Toyota Prius.
Toyota Prius requires 1 liter for 16-17,6 km distance, the small car Riversimple can cover distnace much further. If converted to the km per liter gasoline, the riviersimple hydrogen car can go up to 120 km per liter fuel.
source : riversimple