This table shows some of the laptimes over the years.
Remember that all times are official race-times, and that faster times
where sometimes set during practice or at other times.
| Year | Time | Driver | Car | Comment | ||
| 1927 | 15:51.6 | Christian Werner | ||||
| 1931 | 11:48.0 |  | Achille Varzi | Bugatti | ||
| 1932 | 10:49.4 |  | Tazio Nuvolari |  | Alfa Romeo P3 | |
| 1936 | 9:56.6 |  | Bernd Rosemeyer | Auto Union | ||
| 1939 | 9:52.2 |  | Hermann Lang |  | Mercedes-Benz W154 | |
| 1956 | 9:41.6 |  | Juan Manuel Fangio | Lancia Ferrari D50 | ||
| 1957 | 9:17.4 |  | Juan Manuel Fangio |  | Maserati 250F | |
| 1958 | 9:09.2 |  | Stirling Moss |  | Vanwall VW | |
| 1961 | 8:57.8 |  | Phil Hill |  | Ferrari 156 | Did 8:55.2 in practice |
| 1969 | 7:43.8 |  | Jacky Ickx |  | Brabham-Cosworth BT26A | |
| 1975 | 7:06.4 |  | Clay Regazzoni | Ferrari 312T |