Race Win Ratio

until 1967 Canadian 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	Ferguson	50.00%	1	2
1	Mercury	50.00%	1	2
3	EMW	33.33%	7	21
4	IFA	25.00%	2	8
4	Reif	25.00%	2	8
6	Alfa Romeo	23.33%	35	150
7	Mercedes	23.26%	10	43
8	Vanwall	14.61%	13	89
9	Watson	13.64%	3	22
10	Lancia	12.12%	4	33
11	Epperly	11.76%	2	17
12	Ferrari	11.51%	115	999
13	Brabham	8.41%	28	333
14	BMW	7.87%	7	89
15	Eagle	7.69%	2	26
16	Simca-Gordini	6.74%	12	178
17	Connaught	6.50%	21	323
18	Simca	6.45%	2	31
19	Lotus	6.20%	70	1129
20	Maserati	5.89%	82	1393
21	BRM	5.42%	23	424
22	ERA	5.24%	12	229
23	Cisitalia	5.08%	6	118
24	Ford	4.76%	1	21
25	Talbot-Lago	4.52%	19	420
26	Cooper	4.34%	66	1519
27	AFM	4.26%	2	47
28	Gordini	3.60%	8	222
29	Honda	3.33%	1	30
30	BRP	3.23%	1	31
31	Porsche	3.18%	5	157
32	OSCA	2.78%	1	36
33	LDS	2.73%	3	110
34	Kuzma	2.70%	1	37
35	Lola	2.60%	2	77
36	Kurtis Kraft	2.58%	5	194
37	Veritas	2.25%	2	89
38	MG	2.17%	1	46
39	Frazer-Nash	1.85%	1	54
40	Bugatti	1.79%	1	56
41	Delahaye	1.53%	2	131
42	HWM	1.12%	2	179

Finishing position: