Race Win Ratio

until 1961 Naples 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	Car Manufacturer	Race Win Ratio	Race Wins	Entries
1	Mercury	50.00%	1	2
2	EMW	33.33%	7	21
3	IFA	25.00%	2	8
3	Reif	25.00%	2	8
5	Alfa Romeo	23.33%	35	150
6	Mercedes	23.26%	10	43
7	Vanwall	14.61%	13	89
8	Watson	13.64%	3	22
9	Lancia	12.12%	4	33
10	Epperly	11.76%	2	17
11	Ferrari	11.54%	95	823
12	Porsche	8.33%	2	24
13	BMW	7.87%	7	89
14	Simca-Gordini	6.74%	12	178
15	Connaught	6.50%	21	323
16	Simca	6.45%	2	31
17	Maserati	5.89%	82	1392
18	ERA	5.24%	12	229
19	Cisitalia	5.08%	6	118
20	Cooper	5.01%	48	959
21	Ford	4.76%	1	21
22	Talbot-Lago	4.52%	19	420
23	AFM	4.26%	2	47
24	Lotus	3.82%	10	262
25	Gordini	3.60%	8	222
26	BRM	3.23%	5	155
27	OSCA	2.78%	1	36
28	Kuzma	2.70%	1	37
29	Kurtis Kraft	2.58%	5	194
30	Veritas	2.25%	2	89
31	MG	2.22%	1	45
32	Frazer-Nash	1.85%	1	54
33	Bugatti	1.79%	1	56
34	Delahaye	1.53%	2	131
35	HWM	1.12%	2	179

Finishing position: