Race Win Ratio

until 2009 Italian 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	Brawn	30.77%	8	26
5	IFA	25.00%	2	8
5	Reif	25.00%	2	8
7	Mercedes	23.26%	10	43
8	Ralt	16.67%	2	12
9	Vanwall	14.61%	13	89
10	Watson	13.64%	3	22
11	Ferrari	12.48%	290	2323
12	Lancia	12.12%	4	33
13	Epperly	11.76%	2	17
14	Williams	10.71%	117	1092
15	Alfa Romeo	10.26%	35	341
16	McLaren	10.22%	182	1780
17	Matra	9.63%	13	135
18	Lotus	7.67%	178	2320
19	Renault	6.94%	35	504
20	Simca-Gordini	6.74%	12	178
21	Lyncar	6.67%	1	15
22	Connaught	6.50%	21	323
23	Simca	6.45%	2	31
24	Maserati	5.89%	82	1393
25	Wolf	5.36%	3	56
26	Eagle	5.26%	2	38
27	ERA	5.24%	12	229
28	Benetton	5.19%	27	520
29	Cisitalia	5.08%	6	118
30	Brabham	4.96%	69	1391
31	Ford	4.76%	1	21
32	Talbot-Lago	4.52%	19	420
33	AFM	4.26%	2	47
34	Cooper	4.18%	66	1579
35	BRM	3.76%	30	797
36	BMW	3.62%	8	221
37	Gordini	3.60%	8	222
38	Penske	3.39%	2	59
39	Tyrrell	3.33%	31	930
40	BRP	3.23%	1	31
41	Porsche	3.18%	5	157
42	OSCA	2.78%	1	36
43	Kuzma	2.70%	1	37
44	Kurtis Kraft	2.58%	5	194
45	Veritas	2.25%	2	89
46	MG	2.17%	1	46
47	LDS	2.00%	3	150
48	Honda	1.95%	3	154
49	Hesketh	1.85%	2	108
49	Frazer-Nash	1.85%	1	54
51	March	1.85%	14	757
52	Bugatti	1.79%	1	56
53	Red Bull	1.76%	3	170
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	Toro Rosso	0.76%	1	132
63	Chevron	0.66%	1	152

Finishing position: