Most Fuel-Efficient Cars of the Past 30 Years

© Hyundai Motor America© Hyundai Motor America
2016–2019 Hyundai Sonata Hybrid SE
EPA Rating: 40 mpg city / 46 mpg highway / 42 mpg combined
The second-generation Sonata Hybrid debuted in 2015 with a more powerful and more efficient drivetrain than the previous version, achieving a 4 mpg increase to 40 mpg city / 44 mpg highway / 42 mpg combined. The new Sonata Hybrid is powered by a 2.0-liter gasoline direct-injection 4-cylinder engine combined with a 6-speed automatic transmission that includes a more powerful 38-kilowatt electric motor and a clutch in place of the torque converter. Hyundai’s Transmission-Mounted Electrical Device delivers responsive power while improving fuel economy with the larger electric motor. The transmission uses an electric oil pump for improved efficiency. The Sonata Hybrid can operate on electric power alone at speeds up to 75 mph. The 2.0-liter engine produces 154 horsepower and 140 lb-ft of torque, and the electric motor produces 38 kilowatts (51 horsepower) and 151 lb-ft of torque for a total combined output of 193 horsepower.

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