The most expensive models continue with a 245-hp turbo-four, but the eight-speed automatic transmission is new. The rest of the trims get a 2.4-liter naturally aspirated four making 185 hp.

Hyundai announced the new 2015 Hyundai Sonata Eco, which will start at $24,085 and receives an all-new seven-speed dual-clutch transmission.

Powered by a 1.6-liter turbocharged four-cylinder engine, the 2015 Sonata Eco takes advantage of a new seven-speed dual-clutch transmission to deliver an estimated 28 mpg in the city and 38 mpg on ...