The race began as a non-championship event at the Montjuïc circuit in 1954.
Winterbottom won $100,000 as the big prize of the non-championship event.
Over four hundred Championship or non-Championship events are licensed annually.
An additional non-championship event took place at Imola in 1979.
The P25 began racing in non-championship events in September of 1955.
- Round at Beijing was a non-championship event with no points given out for any of the races.
The site hosted an F1 race in 1957, but it was a non-championship event.
- Not classified in the championship due to only entering the non-championship events.
The race was therefore run as a non-championship event.
He also finished fourth at a non-championship event at Pau.