Many automakers claim they sell 4-door coupes. We beg to disagree, because here are some real ones.

1956 General Motors hardtop coupe ad

4 door coupe, 4-door coupe

Automakers began using pillarless styling on 4-door sedans for the 1956 model year. These are known as hardtop sedans, and this General Motors ad shows all such models from Chevrolet to Cadillac.

Photo: General Motors Corporation

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