2015 Toyota Prius

By now, the 2015 Toyota Prius is both a familiar shape and a fairly well-known quantity among car buyers. The mid-size five-door hatchback with the high tail and wedge shape is the most fuel-efficient car you can buy in the U.S. without a plug--and it's held that title since it was launched six years ago as a 2010 model. Toyota is expected to...