40-MPG, 450-Horsepower Hydrogen Scorpion

The Scorpion gets its sting from a hydrogen delivery system the company calls H2GO. While cars like the Honda FCX Clarity and Chevrolet Equinox use hydrogen fuel cells to drive electric motors, the Scorpion uses electrolysis to convert water into gaseous hydrogen. The hydrogen is mixed with 91-octane gasoline to improve the fuel economy and reduce the emissions of the car's 3.5-liter internal combustion engine.

Ronn Motors is confident that the sexy Scorpion will top 200 mph. The chrome-moly chassis and carbon-fiber body surrounds a twin-turbo 3.5-liter V6 in a car that weighs just 2,200 pounds. The engine was sourced from Acura -- it's the same mill found in the TL Type S, albeit turbocharged -- and mated to a six-speed gearbox. The car will set you back $150,000, and if 450 ponies isn't enough, another $100 grand will get you a tweaked version with another 150 horsepower.