For 1972, the FIA renamed the existing 3 Litre prototype category as Group 5 Sports Cars and these were to be the main competitors in events counting towards the FIA's newly renamed "World Championship for Makes" from 1972 to 1975.
For 1972, the FIA renamed the existing Group 6 Prototype category as Group 5 Sports Cars. These cars, limited to 3 litre capacity, were to be the main competitors in events counting towards the FIA's newly renamed "World Championship for Makes" from 1972 to 1975.