Race Win Ratio

until 1965 South African 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	11.75%	110	936
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	Brabham	6.40%	8	125
18	Lotus	6.21%	58	934
19	Maserati	5.89%	82	1393
20	BRM	5.59%	18	322
21	ERA	5.24%	12	229
22	Cisitalia	5.08%	6	118
23	Ford	4.76%	1	21
24	Talbot-Lago	4.52%	19	420
25	AFM	4.26%	2	47
26	Cooper	4.04%	54	1336
27	Gordini	3.60%	8	222
28	BRP	3.45%	1	29
29	Porsche	3.21%	5	156
30	OSCA	2.78%	1	36
31	Kuzma	2.70%	1	37
32	Lola	2.67%	2	75
33	Kurtis Kraft	2.58%	5	194
34	Veritas	2.25%	2	89
35	MG	2.17%	1	46
36	Frazer-Nash	1.85%	1	54
37	Bugatti	1.79%	1	56
38	Delahaye	1.53%	2	131
39	HWM	1.12%	2	179

Finishing position: