1. Toyota Prius c - 50 MPG Combined
But it’s the little brother to the Prius that tops our top 10 list, thanks to its cheaper starting price of $19,080. The Prius c get an identical 50 mpg combined rating, but is less fuel efficient in the city at 46 mpg. It is however, more fuel efficient on the highway than the standard Prius, achieving a 53 mpg rating. Under the hood is a 1.5-liter four-cylinder engine mated to an electric motor to provide 99 hp and 125 lb-ft of torque. Overall, the Prius c is smaller than the standard Prius, but it’s also cheaper and give or take, provides the same fuel economy depending on your driving habits.