| #1 | #2 | #3 | Porsche | |
|---|---|---|---|---|
| 1980 | Chevrolet (2,288,745) | Renault (1,492,339) | Ford (1,162,275) | 28,622 |
| 1979 | Chevrolet (2,284,749) | Ford (1,835,937) | Renault (1,405,330) | 36,011 |
| 1978 | Chevrolet (2,375,436) | Ford (1,923,655) | Renault (1,240,941) | 36,879 |
| 1977 | Chevrolet (2,543,153) | Toyota (1,884,260) | Ford (1,840,427) | 36,130 |
| 1976 | Chevrolet (2,103,862) | Toyota (1,884,260) | Ford (1,861,537) | 32,554 |
| 1975 | Chevrolet (1,755,773) | Toyota (1,714,836) | Ford (1,569,608) | 16,224 |
| 1974 | Chevrolet (2,333,839) | Ford (2,179,791) | Renault (1,355,799) | 21,029 |
| 1973 | Chevrolet (2,579,509) | Ford (2,349,815) | Fiat (1,390,251) | 23,771 |
| 1972 | Chevrolet (2,420,564) | Ford (2,246,563) | Fiat (1,368,216) | 20,464 |
| 1971 | Ford (2,054,351) | Chevrolet (1,830,319) | Volkswagen (1,128,784) | 17,239 |
| 1970 | Ford (2,096,184) | Chevrolet (1,451,305) | Volkswagen (1,193,853) | 13,898 |
