Race Win Ratio

until 1964 Belgian 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	Alfa Romeo	14.71%	35	238
7	Vanwall	14.44%	13	90
8	Ferrari	11.63%	107	920
9	Lancia	11.43%	4	35
10	Connaught	10.14%	14	138
11	BMW	7.65%	13	170
12	Simca-Gordini	7.19%	12	167
13	Climax	6.02%	100	1662
14	Simca	5.88%	2	34
15	Talbot-Lago	5.60%	19	339
16	Maserati	5.36%	83	1548
17	ERA	5.29%	12	227
18	Cisitalia	5.13%	6	117
19	BRM	4.93%	21	426
20	Lea-Francis	4.17%	5	120
21	Gordini	3.45%	8	232
22	Offenhauser	3.12%	11	352
23	Bristol	2.97%	9	303
24	Porsche	2.94%	5	170
25	Frazer-Nash	2.13%	1	47
26	MG	2.04%	1	49
27	Bugatti	1.82%	1	55
28	Alta	1.81%	7	387
29	OSCA	1.79%	1	56
30	Delahaye	1.53%	2	131
31	Ford	1.23%	1	81
32	Veritas	1.15%	1	87

Finishing position: