Nonhybrid 2018 Sonatas are motivated by the same trio of four-cylinder engines as before: a 178-hp turbocharged 1.6-liter, a 185-hp 2.4-liter, and a 245-hp turbocharged 2.0-liter. The smaller turbo is reserved solely for the Eco trim and is mated to a seven-speed dual-clutch automatic transmission. The 2.4-liter again pairs with a six-speed automatic,but the 2.0T trades its previous six-speed for a new eight-speed unit.