Titles Engine Nat.
15 Ferrari ITA*
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14 Mercedes-Benz GER*
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13 Ford GBR
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11 Renault FRA*
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7 Honda JPN
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4 Climax GBR
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3 TAG-Porsche GER
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2 Alfa Romeo ITA
Honda RBPT JPN*
Repco AUS
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1 BMW GER
BRM GBR
Maserati ITA
RBPT AUT
* = Active engines