Race Win Ratio

until 1960 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	Vanwall	14.77%	13	88
8	Watson	13.64%	3	22
9	Lancia	12.12%	4	33
10	Epperly	11.76%	2	17
11	Ferrari	11.54%	92	797
12	BMW	7.87%	7	89
13	Simca-Gordini	6.74%	12	178
14	Connaught	6.54%	21	321
15	Simca	6.45%	2	31
16	Maserati	5.94%	82	1380
17	ERA	5.24%	12	229
18	Cisitalia	5.08%	6	118
19	Ford	4.76%	1	21
20	Cooper	4.67%	35	750
21	Talbot-Lago	4.55%	19	418
22	AFM	4.26%	2	47
23	BRM	4.17%	5	120
24	Gordini	3.60%	8	222
25	Lotus	3.50%	5	143
26	OSCA	2.78%	1	36
27	Kuzma	2.70%	1	37
28	Kurtis Kraft	2.58%	5	194
29	MG	2.44%	1	41
30	Veritas	2.25%	2	89
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: