Saab Aero X - 2007 concept car

The new Saab Aero X concept car runs on 100 percent ethanol and holds 400 horsepower under the hood. Unveiled at the Geneva Auto Show, the Aero X ethanol concept car uses a cockpit canopy instead of doors or windshield pillars.

“The 400-hp, twin-turbo, BioPower V6 engine is fueled entirely by ethanol,” Saab said in a statement touting the environmental benefits of reduced emissions of carbon dioxide, a gas that many scientists tie to global warming.

Saab, a General Motors division that started life by making airplanes in Sweden, hasn’t committed to ever producing the Aero X and even the concept hasn’t been fully tested on a track. Saab would only say that “computer simulations anticipate zero to 62 mph acceleration in just 4.9 seconds and a 155 mph top speed.”

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