2. 2009 Toyota Prius – 46 MPG Combined
Under the hood this fuel-saving hatch is powered by a 1.5-liter four-cylinder engine. But that’s not what makes this car unique. An electric motor, CVT and nickel-metal hydride battery pack complete the powertrain picture and deliver at net system horsepower of 110.
All this technology pays off at the pump. Drivers are treated to a whopping 48 miles per gallon in the city and 45 on the highway. According to Uncle Sam’s environmental lackeys the vehicle should deliver a combined score of 46 MPG, enough for a second-place finish.
If you’re in the market for a luxury Prius check out the Lexus version, the abortive HS 250h. It’s built on the same platform as the popular Toyota but the vehicle itself is a bit larger and a lot less efficient.