Race Win Ratio

until 1958 Monaco 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	Mercury	50.00%	1	2
2	EMW	33.33%	7	21
2	Epperly	33.33%	1	3
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	Watson	16.67%	1	6
9	Lancia	12.12%	4	33
10	Ferrari	12.07%	87	721
11	Vanwall	11.11%	7	63
12	BMW	7.87%	7	89
13	Simca-Gordini	6.74%	12	178
14	Connaught	6.62%	21	317
15	Simca	6.45%	2	31
16	Maserati	6.27%	82	1307
17	BRM	5.45%	3	55
18	ERA	5.24%	12	229
19	Cisitalia	5.08%	6	118
20	Ford	4.76%	1	21
21	Talbot-Lago	4.56%	19	417
22	AFM	4.35%	2	46
23	Cooper	4.29%	22	513
24	Kuzma	4.00%	1	25
25	Gordini	3.60%	8	222
26	Kurtis Kraft	3.18%	5	157
27	Lotus	2.99%	2	67
28	OSCA	2.78%	1	36
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: