What Do These Vehicles Have in Common?

Here are four vehicles that are currently listed on AutoHunter or ClassicCars.com. They vary in age and practicality, but they do share an engineering feature that may be unique, depending on the model year. Can you determine what that may be?

Post your answer in the comments section below. And, since we currently have your attention, why not post the year, make, and model too? Click on an image if you need a hint.

Click on each image to reveal each car

Every Tuesday, The ClassicCars.com Journal features a car game to challenge your automotive acumen. Play previous puzzles for more automotive challenges!

Source: www.classiccars.com