The all-new 2021 Kia K5 is a 2021 Kia Optima by any other name. The K5 replaces that highly successful midsize sedan, which spearheaded Kia’s U.S. success for nearly a decade and was also available as a hybrid and a plug-in hybrid.

While we at Autorader like the Optima name, we can understand why Kia gave its mainstream midsize sedan a new name.
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