1981 World Sportscar Championship
The 1981 World Sportscar Championship season was the 29th season of FIA World Sportscar Championship motor racing. It featured the 1981 FIA World Endurance Championship which was contested over a fifteen race series which ran from 31 January to 27 September. The former World Challenge for Endurance Drivers was renamed to the World Endurance Championship of Drivers for 1981 and the World Championship of Makes was renamed to the World Endurance Championship of Makes. Bob Garretson won the World Endurance Championship of Drivers and Lancia was awarded the World Endurance Championship of Makes.
Schedule
World Endurance Championship of Drivers was contested over all fifteen races however only six of the races counted towards the World Endurance Championship of Makes.| Drivers Rd. | Makes Rd. | Race | Circuit | Date |
| 1 | 1 |  24 Hours Pepsi Challenge | Daytona International Speedway | 31 January 1 February |
| 2 | - | Coca-Cola 12 Hours of Sebring | Sebring International Raceway | 21 March |
| 3 | - |  Mugello 6 Hours | Mugello Circuit | 12 April |
| 4 | 2 | 1000km Monza | Autodromo Nazionale Monza | 26 April |
| 5 | - | Los Angeles Times Toyota Grand Prix | Riverside International Raceway | 26 April |
| 6 | 3 |  Silverstone 6 Hours | Silverstone Circuit | 10 May |
| 7 | 4 |  1000km Nürburgring | Nürburgring | 24 May |
| 8 | 5 |  24 Hours of Le Mans | Circuit de la Sarthe | 13 June 14 June |
| 9 | - | Coppa Florio | Autodromo di Pergusa | 28 June |
| 10 | - | 6 Hours of Daytona Champion Spark Plug Challenge | Daytona International Speedway | 2 July |
| 11 | 6 | 6 Hours of Watkins Glen | Watkins Glen International | 12 July |
| 12 | - |  24 Hours of Spa-Francorchamps | Circuit de Spa-Francorchamps | 26 July 27 July |
| 13 | - |  Molson 1000 Kilometres | Mosport Park | 16 August |
| 14 | - | Pabst 500 Miles | Road America | 23 August |
| 15 | - | Flying Tigers 1000 Kilometres | Brands Hatch | 27 September |
Season results
Although various classes of cars contested the championship races, only the overall race winners are listed in the table below.| Rnd | Circuit | Overall Winning Team | Results |
| Rnd | Circuit | Overall Winning Drivers | Results |
| Rnd | Circuit | Overall Winning Car | Results |
| 1 | Daytona | #9 Garretson Racing | Results |
| 1 | Daytona | Bob Garretson Bobby Rahal Brian Redman | Results |
| 1 | Daytona | Porsche 935 | Results |
| 2 | Sebring | #86 Bayside Disposal Racing | Results |
| 2 | Sebring | Al Holbert Hurley Haywood Bruce Leven | Results |
| 2 | Sebring | Porsche 935 | Results |
| 3 | Mugello | #14 Osella Squadra Corse | Results |
| 3 | Mugello | Giorgio Francia Lella Lombardi | Results |
| 3 | Mugello | Osella PA9 BMW | Results |
| 4 | Monza | #3 Weralit Racing Team | Results |
| 4 | Monza | Edgar Dören Jürgen Lässig Gerhard Holup | Results |
| 4 | Monza | Porsche 935 | Results |
| 5 | Riverside | #1 John Fitzpatrick Racing | Results |
| 5 | Riverside | John Fitzpatrick Jim Busby | Results |
| 5 | Riverside | Porsche 935 K3 | Results |
| 6 | Silverstone | #22 Vegla Racing Team | Results |
| 6 | Silverstone | Harald Grohs Walter Röhrl Dieter Schornstein | Results |
| 6 | Silverstone | Porsche 935 | Results |
| 7 | Nürburgring | #12 GS Tuning | Results |
| 7 | Nürburgring | Hans-Joachim Stuck Nelson Piquet | Results |
| 7 | Nürburgring | BMW M1 | Results |
| 8 | La Sarthe | #11 Porsche System | Results |
| 8 | La Sarthe | Jacky Ickx Derek Bell | Results |
| 8 | La Sarthe | Porsche 936/81 | Results |
| 9 | Pergusa | #3 Grid Team Lola | Results |
| 9 | Pergusa | Guy Edwards Emilio de Villota | Results |
| 9 | Pergusa | Lola T600 Ford Cosworth DFV | Results |
| 10 | Daytona | #38 Mandeville Racing | Results |
| 10 | Daytona | Roger Mandeville Amos Johnson | Results |
| 10 | Daytona | Mazda RX-7 | Results |
| 11 | Watkins Glen | #1 Martini Racing | Results |
| 11 | Watkins Glen | Riccardo Patrese Michele Alboreto | Results |
| 11 | Watkins Glen | Lancia Beta Montecarlo | Results |
| 12 | Spa | #40 Tom Walkinshaw Racing | Results |
| 12 | Spa | Tom Walkinshaw Pierre Dieudonné | Results |
| 12 | Spa | Mazda RX-7 | Results |
| 13 | Mosport | #3 Andial Meister Racing | Results |
| 13 | Mosport | Harald Grohs Rolf Stommelen | Results |
| 13 | Mosport | Porsche 935 | Results |
| 14 | Road America | #3 Andial Meister Racing | Results |
| 14 | Road America | Harald Grohs Rolf Stommelen | Results |
| 14 | Road America | Porsche 935 | Results |
| 15 | Brands Hatch | #3 Banco Occidental Ultramar Lola | Results |
| 15 | Brands Hatch | Guy Edwards Emilio de Villota | Results |
| 15 | Brands Hatch | Lola T600 Ford Cosworth DFL | Results |
- The 24 Hours of Daytona, the 12 Hours of Sebring, the Los Angeles Times Grand Prix and the Road America 500 were also rounds of the 1981 IMSA GT Championship.
- The 6 Hours of Daytona was restricted to Racing Stock class cars .
- The 24 Hours of Spa was restricted to Belgian Touring Cars .
World Endurance Championship of Drivers
Drivers Championship points were awarded on a 20-19-18-17-16-15-14-13-12-11-10-9-8-7-6-5-4-3-2-1 basis to the first twenty overall finishers at each round.
Bonus points were also awarded as follows:
- 0 points for Category 1
- 1 point for Category 2
- 2 points for Category 3
- 3 points for Category 4
- 4 points for Category 5
- 5 points for Category 6
Results
A total of 371 drivers scored points in the 1981 World Endurance Championship of Drivers.World Endurance Championship of Makes
The World Endurance Championship of Makes was open FIA Group 1, Group 2, Group 3, Group 4 and Group 5 cars and to IMSA GTX cars.Cars from all eligible groups were combined, and then divided into two Divisions based on engine capacity.
Points were awarded on a 20-15-12-10-8-6-4-3-2-1 basis for the top ten places in each Division at each race.
Only the best placed car of each make in each division at each race was eligible to score points.
Cars from groups not included in the championship were disregarded when assessing divisional positions for championship purposes.
Only half points were awarded for the shortened Nurburgring race.
The best five round results could be retained by each make.