On
Off
Firestone
Motors
Motors
GP
Ford Cosworth
557
Offenhauser
394
BRM
219
Ferrari
149
Maserati
51
Climax
27
Honda
23
Alfa Romeo
11
Tecno
10
Novi
10
Repco
9
Ford
3
Pratt & Whitney
3
Cummins
2
Serenissima
1