The 1978 World Sportscar Championship season was the 26th season of FIAWorld Sportscar Championship motor racing. It featured the 1978 World Championship for Makes, which was contested from 4 February to 3 September 1978 over an eight race series.
The championship was open to cars in Groups 1 to 5, i.e.:
Porsche was awarded the overall championship  and the Division 2 title for cars with an engine capacity of over 2 litres.BMW was awarded the Division 1 title for cars with an engine capacity of up to 2 litres  and Porsche won the GT Cup.
Points were awarded to the top 10 finishers in each division on a 20-15-12-10-8-6-4-3-2-1 basis. Manufacturers were only allocated points for their highest finishing car with no points awarded for positions filled by any other car from that manufacturer.
Only the best six points finishes could be retained towards the championship, with any other points earned not included in the total.