Toyota Prius

As with many of Toyota's vehicles, the Prius has become a standard-bearer in its segment. This four-door hybrid has become a hit with consumers because of its stellar fuel economy, relatively uncompromised driving and acceleration characteristics. The Prius's claim to fame, of course, is its impressive fuel economy. The current-generation Prius posts fuel economy numbers of 51/48 mpg, or a combined number of 50 mpg.