4. Honda Insight 1.3L (1,339 cc)
Joining the Volt as another alternate fuel vehicle, is the Honda Insight, which uses a gas-electric hybrid drive train. The tiny 1.3-liter engine works in tandem with the electric motors in the Insight to make a total output of 98-hp. That hybrid system earns a stunning 41/44 mpg. The Insight is attainable at $18,500, which isn’t a bad price point for a compact hybrid vehicle.