Race Win Ratio

until 2008 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	IFA	25.00%	2	8
4	Reif	25.00%	2	8
6	Mercedes	23.26%	10	43
7	Ralt	16.67%	2	12
8	Vanwall	14.61%	13	89
9	Watson	13.64%	3	22
10	Ferrari	12.58%	288	2289
11	Lancia	12.12%	4	33
12	Epperly	11.76%	2	17
13	Williams	11.06%	117	1058
14	McLaren	10.31%	180	1746
15	Alfa Romeo	10.26%	35	341
16	Matra	9.63%	13	135
17	Lotus	7.67%	178	2320
18	Renault	7.02%	33	470
19	Simca-Gordini	6.74%	12	178
20	Lyncar	6.67%	1	15
21	Connaught	6.50%	21	323
22	Simca	6.45%	2	31
23	Maserati	5.89%	82	1393
24	Wolf	5.36%	3	56
25	Eagle	5.26%	2	38
26	ERA	5.24%	12	229
27	Benetton	5.19%	27	520
28	Cisitalia	5.08%	6	118
29	Brabham	4.96%	69	1391
30	Ford	4.76%	1	21
31	Talbot-Lago	4.52%	19	420
32	BMW	4.28%	8	187
33	AFM	4.26%	2	47
34	Cooper	4.18%	66	1579
35	BRM	3.76%	30	797
36	Gordini	3.60%	8	222
37	Penske	3.39%	2	59
38	Tyrrell	3.33%	31	930
39	BRP	3.23%	1	31
40	Porsche	3.18%	5	157
41	OSCA	2.78%	1	36
42	Kuzma	2.70%	1	37
43	Kurtis Kraft	2.58%	5	194
44	Veritas	2.25%	2	89
45	MG	2.17%	1	46
46	Honda	2.05%	3	146
47	LDS	2.00%	3	150
48	Hesketh	1.85%	2	108
48	Frazer-Nash	1.85%	1	54
50	March	1.85%	14	757
51	Bugatti	1.79%	1	56
52	Surtees	1.64%	8	488
53	Delahaye	1.53%	2	131
54	Ligier	1.46%	9	615
54	Lola	1.46%	9	615
56	HWM	1.12%	2	179
57	Stewart	1.02%	1	98
57	Toro Rosso	1.02%	1	98
59	Jordan	0.80%	4	500
60	Shadow	0.76%	2	262
61	Chevron	0.66%	1	152

Finishing position: