For reasons that cannot be explained, Kia is doubling down on mid-sized sedans. For 2021 we'll have the RWD/AWD Stinger, the FWD/AWD K5 and the FWD Cadenza all vying for your dollars and that's before we consider the Forte, Rio and K900 sedans. Where does the sedan formerly known as Optima fit into this 4-door assault? Let's find out.

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