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	Francis	61.76%	21	34
18	Veritas	61.54%	8	13
19	Gordini	60.36%	67	111
20	ERA	60.00%	6	10
	Novi	60.00%	6	10
	Scarab	60.00%	6	10
23	Alfa Romeo	58.86%	299	508
24	BMW	57.91%	205	354
25	Alta	57.69%	45	78
26	Hart	57.25%	158	276
27	Peugeot	57.14%	16	28
28	Zakspeed	54.81%	57	104
29	Aston Martin	54.55%	6	11
30	Offenhauser	53.28%	187	351
31	Megatron	53.19%	50	94
32	Maserati	50.84%	272	535
33	Plate	50.00%	4	8
33	Speluzzi	50.00%	1	2
35	Talbot	49.38%	40	81
36	Ilmor	48.72%	76	156
37	BRM	47.91%	366	764
38	Mercedes	46.97%	31	66
39	Yamaha	46.15%	72	156
40	Repco	45.57%	36	79
41	Matra	44.75%	81	181
42	Renault	44.21%	340	769
43	OSCA	43.75%	7	16
43	Osella	43.75%	7	16
45	Lamborghini	42.58%	109	256
46	Bristol	42.55%	20	47
47	Judd	40.94%	165	403
48	Castellotti	40.00%	2	5
49	Climax	39.44%	312	791
50	Ford	38.66%	2287	5915
51	Ferrari	37.47%	519	1385
52	Mugen-Honda	36.96%	34	92
53	TAG	36.30%	49	135
54	Honda	35.39%	155	438
55	Porsche	21.98%	20	91

Finishing position: