The GM designed oil-cooled, permanent magnet motor is the heart of the Spark EV's propulsion system.

ENGADGET: Chevy Spark EV rated most efficient retail car with 82-mile range, 119 MPGe

This Lexus Hybrid Drive powertrain features an all-new, ultra-smooth running, 2.5 litre 4-cylinder petrol engine mated to a compact, high-output, water-cooled permanent magnet electric motor.

ENGADGET: Lexus LF-CC Concept shows the future of touchscreen interiors

The 2.5-liter inline 4-cylinder gas engine and permanent magnet AC synchronous electric motor in the MKZ deliver 191 net horsepower, a modest amount of power for a 3, 752 lb vehicle.

FORBES: 2011 Lincoln MKZ Hybrid - The Hybrid for Old Guys