1964 World Sportscar Championship
The 1964 World Sportscar Championship season was the 12th season of FIA 'World Sportscar Championship' motor racing. It featured the 1964 International Championship for GT Manufacturers which was open to Group 3 GT cars and was contested from 16 February 1964 to 11 October 1964 over a twenty race series. Titles were awarded in three engine capacity divisions:
- Division I – Under 1300cc
- Division II – Under 2000cc
- Division III – Over 2000cc
- Outright
- Under 3000cc
Schedule
| Race | Race name | Circuit or Location | Date | GTI | GTII | GTIII | Prot. | Points Coefficient | Results |
| 1 |  2000 km of Daytona | Daytona International Speedway Road Course | 16 February | - | Rd 1 | Rd 1 | - | 1.3 | |
| 2 | 12 Hours of Sebring | Sebring International Raceway | 21 March | Rd 1 | Rd 2 | Rd 2 | Rd 1 | 1.6 | |
| 3 |  Targa Florio | Palermo | 26 April | - | Rd 3 | Rd 3 | Rd 2 | 1.6 | Report |
| 4 | Monza 3 Hours | Autodromo Nazionale Monza | 3 May | Rd 2 | - | - | - | 1.3 | |
| 5 |  500 km of Spa | Circuit de Spa-Francorchamps | 17 May | - | Rd 4 | Rd 4 | - | 1.3 | |
| 6 | La Consuma Hillclimb | Consuma | 24 May | Rd 3 | - | - | - | 1.0 | |
| 7 |  ADAC 1000km Rennen Nürburgring | Nürburgring | 31 May | Rd 4 | Rd 5 | Rd 5 | Rd 3 | 1.6 | |
| 8 | Alpenbergpreis Rossfeld | Rossfeld | 7 June | Rd 5 | - | - | - | 1.0 | |
| 9 |  24 Hours of Le Mans | Circuit de la Sarthe | 20–21 June | - | Rd 6 | Rd 6 | Rd 4 | 2.0 | Report |
| 10 | International 12 Hours of Reims | Reims-Gueux | 5 July | - | Rd 7 | Rd 7 | - | 1.0 | Report |
| 11 | Grosser Bergpreis Freiburg-Schauinsland | Schauinsland | 9 August | - | Rd 8 | Rd 8 | - | 1.0 | |
| 12 | Coppa Citta di Enna | Autodromo di Pergusa | 16 August | - | Rd 9 | - | - | 1.3 | |
| 13 |  RAC Gallaghers Tourist Trophy | Goodwood Circuit | 29 August | - | - | Rd 9 | - | 1.3 | |
| 14 |  Grosser Bergerpreis Sierre Crans-Montana | Crans-Montana | 30 August | Rd 6 | Rd 10 | Rd 10 | - | 1.0 | |
| 15 | 500 km Nürburgring | Nürburgring | 6 September | Rd 7 | - | - | - | 1.0 | |
| 16 | Coppa Inter-Europa | Autodromo Nazionale Monza | 6 September | - | Rd 11 | - | - | 1.3 | |
| 17 | Double 500 km | Bridgehampton Race Circuit | 19 September | Rd 8 | Rd 12 | Rd 11 | - | 1.6 | |
| 18 | Double 500 km | Bridgehampton Race Circuit | 20 September | Rd 9 | Rd 13 | - | - | 1.3 | |
| 19 | Tour de France | See race link for more info | 11–20 September | - | - | Rd 12 | - | 1.3 | |
| 20 | 1000 km of Paris | Autodrome de Montlhéry | 11 October | Rd 10 | Rd 14 | - | - | 1.6 |
Points system
International Championship for GT Manufacturers
- Points were awarded to the top six positions in each division in each race on a 9-6-4-3-2-1 basis with the relevant points coefficient applied.
- Points were awarded only for the position gained by the best placed car from each manufacturer in each division at each race.
- Only the best six race results plus one hillclimb result were retained towards the final classification.
- Manufacturers had to enter at least six races and one hillclimb to be eligible for championship classification.
International Prototypes Trophy
- Points were awarded to the top six positions outright and in the Under 3000cc division in each race on a 9-6-4-3-2-1 basis with the relevant points coefficient applied.
- Points were awarded only for the position gained by the best placed car from each manufacturer at each race.
- All points were retained towards the final classification.
- Manufacturers had to enter all four Trophy races to be eligible for championship classification.
Results
International Championship for GT Manufacturers
Division I (1300 cc)
Division II (2000 cc)
Division III (+2000 cc)
Note: Some manufacturers may have been ineligible for championship classification under the minimum race participation regulation.International Prototypes Trophy
Note:- Ferrari scored 46.8 points but was deemed ineligible for classification as it had not contested the Prototype category at all four races.
- Iso, MG & Chevrolet also scored points but were ineligible for classification for the same reason.
- 3000 cc
- MG, Rene Bonnet, Triumph, Diva, Martini & Volvo all scored points but were deemed ineligible for classification as they had not contested the Prototype category at all four races.