9. 1978 Mercury Zephyr
The Mercury Zephyr is another entry from the 1970s, and was based on the design of Ford Fairmont. The 1970s is not exactly an exciting time for car designs in the US, and the 1978 Mercury Zephyr is a perfect illustration for this. There are a number of forgettable things about the Zephyr including slanted taillights, upright grille and bizarre roof line.