http://FremontFord.com 877-269-9651 An electric motor powered by an innovative nickel-metal-hydride (NiMH) battery. And the 2.5L Atkinson-cycle I-4 gas engine. The combined energy of these two sources supplies the power for the Ford Fusion Hybrid. A full hybrid, Fusion can start off from a complete stop and travel at light to normal acceleration up to 47 miles per hour on electric power alone, with no fuel used. The I-4 gas engine kicks in extra power when needed, such as in passing or merging situations, and provides the main source of power above 47 mph. Both the gas engine and the electric motor combine to deliver a maximum 191 net horsepower.