The Kia Optima S is a mid-size sedan manufactured by Kia Motors, a South Korean automobile manufacturer. It is available in a variety of engine sizes and body styles and is one of the most popular vehicles in the Optima lineup. The Optima S offers a comfortable ride, plenty of safety and convenience features, and a range of engine choices. It typically comes with a 2.0L or 2.4L engine, six-speed automatic transmission, and front-wheel drive.