Simply put, all of the power that goes to the wheels of the Volt goes through its 111 kW (149 hp equivalent) electric motor.

FORBES: 2013 Chevrolet Volt - Not Quite Electrifying

It consists of a GM-designed, coaxial drive unit and electric motor that together deliver 130 hp (110 kW) and 400 lb.

ENGADGET: Chevy details 2014 Spark EV: under $25,000, 0-60 in 8 seconds and a 20-minute fast charge

The car uses a 1.8-liter, 98-horsepower four-cylinder gasoline engine with an 80 hp (60 kW) electric motor charged on a Ni-MH battery.

FORBES: Lexus CT 200h: Better-Looking Than Prius, Possibly As Solid