The Most Energy-Efficient Cars on the Market

Source: Courtesy of Hyundai

2. Hyundai Ioniq Plug-In Hybrid
> Greener Score: 68 out of 100
> Powertrain: Plug-in hybrid
> Fuel economy: 119 combined MPGe, 52 combined MPG (123 / 52 city, 119 / 51 highway)
> 5-year savings in fuel cost: $5,750

Source: Courtesy of Toyota

1. Toyota Prius Prime
> Greener Score: 69 out of 100
> Powertrain: Plug-in hybrid
> Fuel economy: 133 combined MPGe, 54 combined MPG (144 / 55 city, 121 / 54 highway)
> 5-year savings in fuel cost: $5,750