Race Win Ratio

until 1966 ACF 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	11.53%	112	971
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	Lotus	6.41%	67	1046
18	BRM	6.17%	23	373
19	Maserati	5.89%	82	1393
20	Honda	5.88%	1	17
21	ERA	5.24%	12	229
22	Brabham	5.22%	13	249
23	Cisitalia	5.08%	6	118
24	Ford	4.76%	1	21
25	Talbot-Lago	4.52%	19	420
26	AFM	4.26%	2	47
27	Cooper	4.18%	59	1413
28	Gordini	3.60%	8	222
29	BRP	3.33%	1	30
30	Porsche	3.18%	5	157
31	OSCA	2.78%	1	36
32	Kuzma	2.70%	1	37
33	Lola	2.63%	2	76
34	Kurtis Kraft	2.58%	5	194
35	Veritas	2.25%	2	89
36	MG	2.17%	1	46
37	Frazer-Nash	1.85%	1	54
38	Bugatti	1.79%	1	56
39	Delahaye	1.53%	2	131
40	HWM	1.12%	2	179

Finishing position: