Maranello, Italy-based Ferrari went from racing green to environmentally friendly green in 3.5 seconds with the unveiling of the F430 Spiderbiofuel prototype car at the North American International Auto Show in Detroit.

Adapted from the company's existing F430 model, the company said the sleek, silver prototype, which can run on a mix of up to 85 percent ethanol and 15 percent gasoline, can pump out even more power than its regular gas predecessor.

Ferrari said changes to the fuel feed system and to the engine's CPU, and the use of biofuel, boosted performance by an extra 10 horsepower and an additional 4 percent torque, but the overall weight is the same as the original F430.

The company, owned by Turin automaker Fiat, said the biofuel car was developed using experience gained in competition.

Formula 1 cars must use 5.75 percent biofuel, while FIA GT and American Le Mans Series races require the use of 10 percent ethanol.

Ferrari said all of its cars can already use up to 10 percent ethanol without any modification.

Last year, the company announced plans to cut its cars' emissions by 40 percent by 2012.