Race Win Ratio

until 1996 Portuguese 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	Williams	15.03%	98	652
9	Vanwall	14.61%	13	89
10	Watson	13.64%	3	22
11	Lancia	12.12%	4	33
12	Epperly	11.76%	2	17
13	Alfa Romeo	10.26%	35	341
14	Ferrari	9.98%	188	1883
15	Matra	9.63%	13	135
16	McLaren	9.18%	123	1340
17	BMW	7.87%	7	89
18	Lotus	7.67%	178	2320
19	Benetton	7.39%	26	352
20	Simca-Gordini	6.74%	12	178
21	Lyncar	6.67%	1	15
22	Connaught	6.50%	21	323
23	Renault	6.47%	15	232
24	Simca	6.45%	2	31
25	Maserati	5.89%	82	1393
26	Wolf	5.36%	3	56
27	Eagle	5.26%	2	38
28	ERA	5.24%	12	229
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	Honda	4.17%	2	48
36	BRM	3.76%	30	797
37	Gordini	3.60%	8	222
38	Tyrrell	3.60%	31	862
39	Penske	3.39%	2	59
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	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	1.47%	9	613
54	Lola	1.47%	9	613
56	HWM	1.12%	2	179
57	Shadow	0.76%	2	262
58	Chevron	0.66%	1	152

Finishing position: