This document lists 20 concept cars from the 1950s and 1960s that were designed by major American automobile manufacturers like Chrysler, Buick, Ford, GM, Lincoln, Oldsmobile, Cadillac, De Soto, Packard, and Pontiac but were never put into production. Ranging from 1951 to 1959, the concepts showcase innovative designs that explored new automotive styles and technologies ahead of their time.

1. Vingt (20)
AUTOMOBILES
des années 1950-60
jamais mises sur le marché

2. 1957 CHRYSLER DIABLO

3. 1956 BUICK CENTURION II

4. 1954 FORD LA TOSCA

5. 1951 BUICK LESABRE

6. 1959 GM FIREBIRD III

7. 1955 LINCOLN FUTURA

8. 1951 BUICK XP-300

9. 1955 FORD MYSTERE

10. 1959 CADILLAC CYCLONE

11. 1954 OLDSMOBILE ROCKET F88

12. 1958 FORD X-2000

13. 1953 CADILLAC GHIA COUPE

14. 1955 LINCOLN INDIANAPOLIS

15. 195? MERCURY D524 (This car was never shown to the public)

16. 1952 CHRYSLER D’ELEGANCE

17. 1954 DE SOTO ADVENTURER II

18. 1953 FORD X-100

19. 1956 PACKARD PREDICTOR

20. 1956 OLDSMOBILE GOLDEN ROCKET

21. 1956 PONTIAC CLUB DE MER