Race Win Ratio

until 2017 Chinese 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	TAG	18.52%	25	135
6	Vanwall	14.44%	13	90
7	Lancia	11.43%	4	35
8	Repco	10.50%	19	181
9	Connaught	10.14%	14	138
10	Mercedes	9.50%	152	1600
11	Ferrari	8.73%	306	3506
12	Weslake	8.00%	2	25
13	Renault	7.73%	168	2172
14	Honda	7.34%	72	981
15	Simca-Gordini	7.19%	12	167
16	Cosworth	6.92%	123	1777
17	Climax	6.19%	130	2100
18	Simca	5.88%	2	34
19	Talbot-Lago	5.60%	19	339
20	ERA	5.29%	12	227
21	Cisitalia	5.13%	6	117
22	Maserati	5.13%	85	1658
23	Alfa Romeo	4.83%	38	786
24	TAG-Heuer	4.35%	2	46
25	Lea-Francis	4.17%	5	120
26	BMW	3.81%	33	866
27	Gordini	3.45%	8	232
28	BRM	3.34%	38	1139
29	Offenhauser	3.12%	11	352
30	Bristol	2.97%	9	303
31	Porsche	2.70%	5	185
32	Ford	2.65%	183	6904
33	Lotus	2.30%	2	87
34	Frazer-Nash	2.13%	1	47
35	MG	2.04%	1	49
36	Bugatti	1.82%	1	55
37	Alta	1.81%	7	387
38	OSCA	1.79%	1	56
39	Matra	1.62%	3	185
40	Delahaye	1.53%	2	131
41	Mugen-Honda	1.36%	4	294
42	Veritas	1.15%	1	87
43	Chevrolet	1.10%	5	453

Finishing position: