Race Win Ratio

until 1977 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
3	Wolf	33.33%	1	3
5	IFA	25.00%	2	8
5	Reif	25.00%	2	8
7	Alfa Romeo	23.33%	35	150
8	Mercedes	23.26%	10	43
9	Vanwall	14.61%	13	89
10	Watson	13.64%	3	22
11	Tyrrell	12.23%	28	229
12	Lancia	12.12%	4	33
13	Epperly	11.76%	2	17
14	Ferrari	11.51%	145	1260
15	Matra	9.63%	13	135
16	Lotus	9.12%	157	1721
17	BMW	7.87%	7	89
18	Simca-Gordini	6.74%	12	178
19	Connaught	6.50%	21	323
20	Simca	6.45%	2	31
21	Maserati	5.89%	82	1393
22	McLaren	5.62%	37	658
23	Brabham	5.52%	51	924
24	Eagle	5.26%	2	38
25	ERA	5.24%	12	229
26	Cisitalia	5.08%	6	118
27	Ford	4.76%	1	21
28	Talbot-Lago	4.52%	19	420
29	AFM	4.26%	2	47
30	Cooper	4.18%	66	1579
31	Honda	4.17%	2	48
32	BRM	3.81%	30	788
33	Gordini	3.60%	8	222
34	BRP	3.23%	1	31
35	Porsche	3.18%	5	157
36	Penske	3.03%	1	33
37	Hesketh	2.82%	2	71
38	OSCA	2.78%	1	36
39	Kuzma	2.70%	1	37
40	Williams	2.63%	1	38
41	Lola	2.60%	9	346
42	Kurtis Kraft	2.58%	5	194
43	Veritas	2.25%	2	89
44	MG	2.17%	1	46
45	March	2.15%	10	466
46	LDS	2.00%	3	150
47	Frazer-Nash	1.85%	1	54
48	Bugatti	1.79%	1	56
49	Delahaye	1.53%	2	131
50	HWM	1.12%	2	179
51	Chevron	0.87%	1	115
52	Surtees	0.77%	3	388
53	Shadow	0.68%	1	148

Finishing position: