Retirement Ratio

Finishing position:

Pos	Engine Manufacturer	Retirement Ratio	Retirements	Entries
1	Milano	100.00%	3	3
	Cummins	100.00%	2	2
	Bugatti	100.00%	1	1
	Jaguar	100.00%	1	1
	JAP	100.00%	1	1
	Kuchen	100.00%	1	1
	Simca	100.00%	1	1
8	ATS (Ita)	84.62%	11	13
9	Motori Moderni	83.75%	67	80
10	Weslake	82.61%	19	23
11	Lancia	80.00%	8	10
12	Simca-Gordini	77.78%	14	18
13	Butterworth	75.00%	3	4
14	Pratt & Whitney	66.67%	2	3
15	Vanwall	65.15%	43	66
16	Tecno	64.29%	9	14
17	Peugeot	62.50%	5	8
18	Francis	61.76%	21	34
19	Veritas	61.54%	8	13
20	Gordini	60.36%	67	111
21	ERA	60.00%	6	10
	Novi	60.00%	6	10
	Scarab	60.00%	6	10
24	Alfa Romeo	58.86%	299	508
25	BMW	57.91%	205	354
26	Alta	57.69%	45	78
27	Hart	57.42%	147	256
28	Zakspeed	54.81%	57	104
29	Aston Martin	54.55%	6	11
30	Ilmor	53.68%	73	136
31	Offenhauser	53.28%	187	351
32	Megatron	53.19%	50	94
33	Maserati	50.84%	272	535
34	Plate	50.00%	4	8
34	Speluzzi	50.00%	1	2
36	Talbot	49.38%	40	81
37	BRM	47.91%	366	764
38	Renault	45.68%	333	729
39	Repco	45.57%	36	79
40	Matra	44.75%	81	181
41	Yamaha	44.12%	60	136
42	OSCA	43.75%	7	16
42	Osella	43.75%	7	16
44	Lamborghini	42.58%	109	256
45	Bristol	42.55%	20	47
46	Judd	40.94%	165	403
47	Castellotti	40.00%	2	5
48	Climax	39.44%	312	791
49	Ford	38.55%	2242	5816
50	Ferrari	37.29%	509	1365
51	TAG	36.30%	49	135
52	Honda	35.39%	155	438
53	Mugen-Honda	34.72%	25	72
54	Mercedes	34.04%	16	47
55	Porsche	21.98%	20	91

Finishing position: