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A gray 2021 Kia K5 sedan, the successor to the Kia Optima, is slightly ahead of another in this head-on picture of both cars on the road.

Is the All-New 2021 Kia K5 a Game-Changing Sedan?

Kia just announced the debut of the K5 sedan, which is the successor to the now-defunct Optima nameplate. While the new mid-size sedan is technically a replacement for the Optima, it’s a little more than just a simple name change. The Kia K5 made its debut in South Korea at the end of 2019, however, …