Race Win Ratio

until 1959 Indianapolis 500

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	Epperly	18.18%	2	11
8	Vanwall	15.12%	13	86
9	Watson	14.29%	2	14
10	Lancia	12.12%	4	33
11	Ferrari	11.90%	90	756
12	BMW	7.87%	7	89
13	Simca-Gordini	6.74%	12	178
14	Connaught	6.58%	21	319
15	Simca	6.45%	2	31
16	Maserati	6.03%	82	1359
17	ERA	5.24%	12	229
18	Cisitalia	5.08%	6	118
19	Ford	4.76%	1	21
20	Talbot-Lago	4.56%	19	417
21	AFM	4.35%	2	46
22	Cooper	4.34%	26	599
23	Gordini	3.60%	8	222
24	BRM	3.49%	3	86
25	Kuzma	2.86%	1	35
26	OSCA	2.78%	1	36
27	Kurtis Kraft	2.70%	5	185
28	MG	2.44%	1	41
29	Veritas	2.25%	2	89
30	Lotus	2.06%	2	97
31	Frazer-Nash	1.85%	1	54
32	Bugatti	1.79%	1	56
33	Delahaye	1.53%	2	131
34	HWM	1.13%	2	177

Finishing position: