Race Win Ratio

until 1988 Japanese GP

Include 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	TAG	18.52%	25	135
7	Honda	14.80%	41	277
8	Vanwall	14.44%	13	90
9	Cosworth	13.33%	122	915
10	Lancia	11.43%	4	35
11	Ferrari	10.64%	174	1635
12	Repco	10.50%	19	181
13	Connaught	10.14%	14	138
14	Weslake	8.00%	2	25
15	Simca-Gordini	7.19%	12	167
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	Alfa Romeo	4.83%	38	786
23	BMW	4.25%	22	518
24	Lea-Francis	4.17%	5	120
25	Renault	4.07%	20	491
26	Gordini	3.45%	8	232
27	BRM	3.34%	38	1139
28	Ford	3.10%	163	5261
29	Bristol	2.97%	9	303
30	Porsche	2.89%	5	173
31	Lotus	2.30%	2	87
32	Frazer-Nash	2.13%	1	47
33	MG	2.04%	1	49
34	Bugatti	1.82%	1	55
35	Alta	1.81%	7	387
36	OSCA	1.79%	1	56
37	Matra	1.62%	3	185
38	Delahaye	1.53%	2	131
39	Veritas	1.15%	1	87
40	Chevrolet	1.10%	5	453

Finishing position: