The 2018 Kia Optima, part of the model's fourth generation, is a midsize sedan known for its high safety scores and comfortable, quiet ride. Engine options include a 2.4-liter inline-4 (185 hp), a 1.6-liter turbo-4 (178-hp), and a 2.0-liter turbo-4 (245-hp), paired with a six-speed automatic or seven-speed dual-clutch automatic transmission. Five trims are available: LX, S, LX 1.6T, EX, and SX. The UVO infotainment system features a 7" or 8" touchscreen with Apple CarPlay, Android Auto, and available navigation. Safety features include a rearview camera, blind spot monitoring, rear cross traffic alert, and parking sensors, with optional forward collision warning, lane departure warning, and autonomous emergency braking.