1966 World Sportscar Championship
The 1966 World Sportscar Championship season was the 14th season of the FIA "World Sportscar Championship" motor racing. It featured the 1966 International Manufacturers' Championship and the 1966 International Sports Car Championship, which were contested between 5 February 1966 and September 11, 1966, over a total of thirteen races. The International Manufacturers' Championship was open to Group 6 Sports-Prototypes and was contested in two engine capacity divisions, P1 and P2. The International Sports Car Championship was open to Group 4 Sports Cars and was contested in three engine capacity divisions, S1, S2 and S3.
Schedule
The 13 championship races each counted towards one or more of the five divisions.Both championships scored points to the top six competitors in each class, under four different tables or 'Baréme'. Baréme I corresponded with the old order of 9-6-4-3-2-1. Baréme II was in the order 10-7-5-4-3-2. Baréme III, valid only for Le Mans, was in the order 12-9-7-5-4-3. Baréme 0, valid only for the Grosser Bergpreis der Schweiz, was half of Baréme I: 4.5-3-2-1.5-1-0.5. Constructors were only awarded points for their highest finishing car. Other finishers from the same manufacturer were merely skipped in the points count.
Only the best 4 results counted towards the championship. Points earned but not counted towards the championship total are listed in.
| IMC | ISCC S1 | ISCC S2 | ISCC S3 | Race | Circuit or Location | Date |
| R 1 | - | R 1 | R 1 |  24 Hours of Daytona | Daytona International Speedway | 5 February 6 February |
| R 2 | R 1 | R 2 | R 2 | 12 Hours of Sebring | Sebring International Raceway | 26 March |
| R 3 | - | R 3 | R 3 |  1000km Monza | Autodromo Nazionale Monza | 25 April |
| R 4 | R 2 | R 4 | R 4 | Targa Florio | Palermo | 8 May |
| R 5 | - | R 5 | R 5 |  1000km Spa | Circuit de Spa-Francorchamps | 25 May |
| R 6 | R 3 | R 6 | R 6 |  1000km Nürburgring | Nürburgring | 5 June |
| R 7 | - | R 7 | R 7 |  24 Hours of Le Mans | Circuit de la Sarthe | 18 June 19 June |
| - | R 4 | - | - | Mugello 500 km | Mugello Circuit | 17 July |
| - | R 5 | - | - | Coppa Citta di Enna | Autodromo di Pergusa | 7 August |
| R 8 | - | R 8 | - | Hockenheim 500 km | Hockenheimring | 14 August |
| - | R 6 | R 9 | R 8 |  Grosser Bergpreis der Schweiz | Crans-Montana | 28 August |
| - | R 7 | - | - | 500 km Nürburgring | Nürburgring | 4 September |
| - | R 8 | R 10 | R 9 |  Austrian Sports Car Grand Prix | Zeltweg Airfield | September 11 |
Note: The Hockenheim 500 km race did not count towards the Over 2000cc division of the International Manufacturers Championship.
Results
International Manufacturers Championship
| Position | Manufacturer | Day | Seb | Mon | Tar | Spa | Nur | LM | Hoc | Total |
| Over 2000cc | ||||||||||
| 1 | Ford | 10 | 10 | - | - | 6 | - | 12 | - | 38 |
| 2 | Ferrari | - | 10 | 10 | 9 | 7 | - | - | 36 | |
| 3 | Chaparral Cars | - | - | - | - | - | 10 | - | - | 10 |
| Up to 2000cc | ||||||||||
| 1 | Porsche | 10 | 10 | 10 | - | - | 12 | 42 | ||
| 2 | Ferrari | - | 7 | 10 | 9 | 10 | - | - | 36 | |
| 3 | Alpine | - | - | - | - | 7 | - | 5 | - | 22 |
| 4 | Austin-Healey | - | 3 | - | 5 | 2 | 3 | - | 13 | |
| 5 | Triumph | 7 | - | - | - | - | - | - | - | 7 |
| 6 | Abarth | - | - | - | - | - | 4 | - | - | 4 |
| ASA | - | - | - | 4 | - | - | - | - | 4 | |
| 8 | Lotus | - | - | - | - | - | - | - | 3 | 3 |
International Sports Car Championship
The cars
The following models contributed to the nett points awarded to their respective manufacturers in the two championships.International Manufacturers Championship - Over 2000cc
International Manufacturers Championship - Up to 2000cc
- Porsche 906
- Dino 206 S
- Alpine-Renault A210
- Austin-Healey Sprite
- Triumph LM
- Abarth 1300 OT
- ASA 411
- Lotus 23B BMW
- Abarth 1300 OT
- Alpine Renault M65 & Alpine Renault A110
- Alfa Romeo Giulietta SZ
- Porsche 904 GTS & Porsche 906
- Alfa Romeo Giulia TZ2
- Lotus Elan
- Volvo P1800
- Ford GT40
- Ferrari 250 GTO & Ferrari 250 LM
- Shelby Cobra