Race Win Ratio

until 2013 Australian 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	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	Ferrari	10.02%	300	2995
11	Mercedes	9.62%	97	1008
12	Renault	8.67%	152	1754
13	Honda	8.03%	72	897
14	Weslake	8.00%	2	25
15	Simca-Gordini	7.19%	12	167
16	Cosworth	7.06%	123	1741
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	Lea-Francis	4.17%	5	120
25	BMW	3.81%	33	866
26	Gordini	3.45%	8	232
27	BRM	3.34%	38	1139
28	Bristol	2.97%	9	303
29	Porsche	2.70%	5	185
30	Ford	2.65%	183	6904
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	Mugen-Honda	1.36%	4	294
40	Veritas	1.15%	1	87
41	Chevrolet	1.10%	5	453

Finishing position: