The 2015 Hyundai Sonata Eco is a third variant of the mid-size sedan that's powered by a 177 horsepower 1.6-liter turbocharged Gamma four-cylinder engine mated to a new seven-speed dual-clutch transmission which together is expected to deliver a combined fuel economy rating of 32 miles per gallon (an estimated 28 mpg city and 38 mpg highway). The 2015 Hyundai Sonata Eco will start at $24,085 (including $810 freight charge) with an optional $4,100 Technology Package. It will go into production at the Hyundai Motor Manufacturing Alabama plant later this summer.