Fastest stages
| Nr. | Average speed (km/h) | Stage | KM | Vertical meters | |
|---|---|---|---|---|---|
| 1 | 44.139 | Stage 13 | Rodez - Revel | 196 | 2163 | |
| 2 | 44.125 | Stage 3 | Wanze - Arenberg Porte du Hainaut | 213 | 1168 | |
| 3 | 43.31 | Stage 1 | Rotterdam - Brussel | 223.5 | 420 | |
| 4 | 42.95 | Stage 2 | Brussel - Spa | 201 | 2708 | |
| 5 | 42.86 | Stage 18 | Salies-de-Béarn - Bordeaux | 198 | 1056 | |
| 6 | 42.854 | Stage 4 | Cambrai - Reims | 153.5 | 1107 | |
| 7 | 42.32 | Stage 12 | Bourg-de-Péage - Mende | 210.5 | 3485 | |
| 8 | 41.54 | Stage 5 | Épernay - Montargis | 187.5 | 1374 | |
| 9 | 40.42 | Stage 6 | Montargis - Gueugnon | 227.5 | 2345 | |
| 10 | 39.48 | Stage 15 | Pamiers - Bagnères-de-Luchon | 187.5 | 3542 | |
| 11 | 39.19 | Stage 11 | Sisteron - Bourg-lès-Valence | 184.5 | 1264 | |
| 12 | 38.547 | Stage 8 | Station des Rousses - Morzine-Avoriaz | 189 | 3636 | |
| 13 | 37.881 | Stage 20 | Longjumeau - Paris | 102.5 | 481 | |
| 14 | 37.82 | Stage 14 | Revel - Ax-3 Domaines | 184.5 | 3796 | |
| 15 | 37.78 | Stage 7 | Tournus - Station des Rousses | 165.5 | 3446 | |
| 16 | 36.284 | Stage 9 | Morzine-Avoriaz - Saint-Jean-de-Maurienne | 204.5 | 5144 | |
| 17 | 36.09 | Stage 16 | Bagnères-de-Luchon - Pau | 199.5 | 4721 | |
| 18 | 34.541 | Stage 10 | Chambéry - Gap | 179 | 3187 | |
| 19 | 34.401 | Stage 17 | Pau - Col du Tourmalet | 174 | 4681 |