The championship winner was never officially announced by the AIACR due to the outbreak of World War II less than two weeks after the final event in Switzerland. The Italian GP initially had been a fifth event, but it became clear well before the war that it would be cancelled due to construction work. At that time, it was also undecided which scoring system would be used, the old minimum points system that basically counted positions, or the French maximum points system similar to the modern one.
AIACR did not officially name the champion because World War II started less than two weeks after the final Swiss event. The Italian Grand Prix was initially scheduled as a fifth race but was canceled due to construction before the war began. It wasn't decided then which scoring method would be used—the old minimum points system or the French maximum points system.