Race Win Ratio

until 1978 United States GP

Ignore Indy 500 races
Ignore non-championship races
Note: records involving non-championship races may be inaccurate due to incomplete data.

Finishing position:

Pos	Engine Manufacturer	Race Win Ratio	Race Wins	Entries
1	EMW	50.00%	5	10
2	Mercury	33.33%	1	3
3	Kollektiv	25.00%	2	8
3	Meteor	25.00%	1	4
5	Mercedes	23.26%	10	43
6	Cosworth	14.73%	114	774
7	Vanwall	14.44%	13	90
8	Lancia	11.43%	4	35
9	Ferrari	11.35%	149	1313
10	Repco	10.50%	19	181
11	Connaught	10.14%	14	138
12	Alfa Romeo	8.43%	37	439
13	Weslake	8.00%	2	25
14	Simca-Gordini	7.19%	12	167
15	BMW	7.14%	13	182
16	Climax	6.19%	130	2100
17	Simca	5.88%	2	34
18	Talbot-Lago	5.60%	19	339
19	ERA	5.29%	12	227
20	Cisitalia	5.13%	6	117
21	Maserati	5.13%	85	1658
22	Lea-Francis	4.17%	5	120
22	Honda	4.17%	2	48
24	Ford	3.68%	120	3261
25	Gordini	3.45%	8	232
26	BRM	3.35%	38	1136
27	Offenhauser	3.12%	11	352
28	Bristol	2.97%	9	303
29	Porsche	2.89%	5	173
30	Lotus	2.30%	2	87
31	Frazer-Nash	2.13%	1	47
32	MG	2.04%	1	49
33	Bugatti	1.82%	1	55
34	Alta	1.81%	7	387
35	OSCA	1.79%	1	56
36	Delahaye	1.53%	2	131
37	Chevrolet	1.17%	5	429
38	Veritas	1.15%	1	87
39	Matra	0.86%	1	116

Finishing position: