How Are These Cars Related?

The below four vehicles are for sale on AutoHunter or ClassicCars.com. They all share one distinction – can you figure what that may be?

Post your answer in the Comments section and, if you fancy yourself as a know-it-all, specify the year, make, and model. If you give up, you can click on each image to find the answer.

Click on each image to reveal each car

The ClassicCars.com Journal serves up an automotive puzzle every Tuesday. Previous puzzles are also available for your automotive fun!