In the 1956 1000km of Nrburgring races, three of the winners used Maserati cars with the other three using Porsches.
Piero Taruffi
Jean Behra Harry Schell
Stirling Moss Maserati 300S Officine Alfieri Maserati 
Porsche snatched fourth place with Wolfgang von Trips/Umberto Maglioli, but their 550 RS finished almost 20 minutes adrift of the Maserati. 
