1. Toyota Prius
Toyota has sold more Priuses than all other hybrids combined. Not until Toyota introduced the second-generation 2004 model did its popularity take off. When that model came out, it sported a new iconic silhouette—an arching aerodynamic sweep from hood to rear. Today, the Prius continues to combine 50-MPG efficiency, a deceptive amount of passenger and cargo space, and an MSRP that begins at $24,000.
The popularity of the Prius led Toyota to make an entire line of Prius vehicles—from the compact Prius C, to the Prius V wagon and the plug-in version of the hatchback. Given the introduction of the new models, 2012 is the best year ever for Prius sales in the United States—already eclipsing 150,000 units in August.