A new mid-size sedan named the K5 debuted for 2021, taking the Optima’s place in Kia’s lineup. The final-generation Optima offered several premium features, as well as two available ...

The Kia K5 debuted for 2021 as the replacement for the Optima mid-size sedan. The K5 name was borrowed from the South Korean version of the car, better aligning the U.S. version with Kia’s ...

Altogether, the Optima is one of the sportiest-feeling mid-size sedans in its base configuration, while the Turbo model promises the acceleration and responsiveness of rival V6 models but with true ...