Race Win Ratio

until 2010 Belgian 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	Brawn	23.53%	8	34
7	Ralt	16.67%	2	12
8	Vanwall	14.61%	13	89
9	Mercedes	14.49%	10	69
10	Watson	13.64%	3	22
11	Ferrari	12.39%	292	2357
12	Lancia	12.12%	4	33
13	Epperly	11.76%	2	17
14	Williams	10.39%	117	1126
15	McLaren	10.36%	188	1814
16	Alfa Romeo	10.26%	35	341
17	Matra	9.63%	13	135
18	Lotus	7.59%	178	2346
19	Simca-Gordini	6.74%	12	178
20	Lyncar	6.67%	1	15
21	Renault	6.51%	35	538
22	Connaught	6.50%	21	323
23	Simca	6.45%	2	31
24	Maserati	5.89%	82	1393
25	Red Bull	5.88%	12	204
26	Wolf	5.36%	3	56
27	Eagle	5.26%	2	38
28	ERA	5.24%	12	229
29	Benetton	5.19%	27	520
30	Cisitalia	5.08%	6	118
31	Brabham	4.96%	69	1391
32	Ford	4.76%	1	21
33	Talbot-Lago	4.52%	19	420
34	AFM	4.26%	2	47
35	Cooper	4.18%	66	1579
36	BRM	3.76%	30	797
37	Gordini	3.60%	8	222
38	BMW	3.49%	8	229
39	Penske	3.39%	2	59
40	Tyrrell	3.33%	31	930
41	BRP	3.23%	1	31
42	Porsche	3.18%	5	157
43	OSCA	2.78%	1	36
44	Kuzma	2.70%	1	37
45	Kurtis Kraft	2.58%	5	194
46	Veritas	2.25%	2	89
47	MG	2.17%	1	46
48	LDS	2.00%	3	150
49	Honda	1.95%	3	154
50	Hesketh	1.85%	2	108
50	Frazer-Nash	1.85%	1	54
52	March	1.85%	14	757
53	Bugatti	1.79%	1	56
54	Surtees	1.64%	8	488
55	Delahaye	1.53%	2	131
56	Ligier	1.46%	9	615
56	Lola	1.46%	9	615
58	HWM	1.12%	2	179
59	Stewart	1.02%	1	98
60	Jordan	0.80%	4	500
61	Shadow	0.76%	2	262
62	Chevron	0.66%	1	152
63	Toro Rosso	0.60%	1	166

Finishing position: