The 2017 Toyota Prius c is available as a 5-door, 5-seat hatchback. Starting at $20,150, the 2017 Toyota Prius c One is powered by a 1.5L , 4 -cylinder engine mated to an automatic transmission that returns an EPA estimated 48-mpg in the city and 43-mpg on the highway. The top of the line 2017ToyotaPrius cFour , priced at $ 24,965 , is powered by a 1.5L , 4 - cylinder engine mated to an automatic transmission that returns an EPA estimated 48-mpg in the city and 43-mpg on the highway.