The series ran from 8 April 1990 to 7 October 1990 and was composed of nine races.
The Montreal race was stopped before 75% distance was completed, therefore half points were awarded.
In order to be classified for points, a team had to complete 75% of the winner's distance.
Further, drivers were required to complete at least 30% of their car's total race distance to qualify for championship points.
1990 24 Hours of Le Mans, a race for Group C Sports Prototypes which did not count towards the 1990 World Sports-Prototype Championship.