Race Win Ratio

until 1966 ACF 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	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	Lancia	12.12%	4	33
10	Ferrari	11.55%	112	970
11	BMW	7.87%	7	89
12	Simca-Gordini	6.74%	12	178
13	Connaught	6.50%	21	323
14	Simca	6.45%	2	31
15	Lotus	6.41%	67	1046
16	BRM	6.17%	23	373
17	Maserati	5.90%	82	1390
18	Honda	5.88%	1	17
19	ERA	5.24%	12	229
20	Brabham	5.22%	13	249
21	Cisitalia	5.08%	6	118
22	Ford	4.76%	1	21
23	Talbot-Lago	4.52%	19	420
24	AFM	4.26%	2	47
25	Cooper	4.18%	59	1413
26	Gordini	3.60%	8	222
27	BRP	3.33%	1	30
28	Porsche	3.18%	5	157
29	OSCA	2.78%	1	36
30	Lola	2.63%	2	76
31	Veritas	2.25%	2	89
32	MG	2.17%	1	46
33	Frazer-Nash	1.85%	1	54
34	Bugatti	1.79%	1	56
35	Delahaye	1.53%	2	131
36	HWM	1.12%	2	179

Finishing position: