Top 10 Cheapest 40 MPG Cars

3.Toyota Prius $24,995

It’s surprising to see just how affordable the Toyota Prius is. At $24,995, the Prius sits at the number 3 spot on our top 10 list. The usual suspects are at play here, with the 134 hp powertrain paired to a CVT transmission. It’s the classic one-two-punch when it comes to fuel efficiency, and it’s a proven combo. The Prius hits a whopping 50 mpg combined on the EPA cycle. We compared the Prius to the Jetta TDI and found the Prius to be the more fuel friendly vehicle. See the full specs of the Toyota Prius right here.