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	83.33%	65	78
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	Zakspeed	67.14%	47	70
15	Pratt & Whitney	66.67%	2	3
16	Vanwall	65.15%	43	66
17	Tecno	64.29%	9	14
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	58.97%	299	507
25	Hart	58.33%	126	216
26	BMW	57.95%	204	352
27	Alta	57.69%	45	78
28	Megatron	55.17%	32	58
29	Aston Martin	54.55%	6	11
30	Offenhauser	53.28%	187	351
31	Renault	51.43%	252	490
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	BRM	47.91%	366	764
37	Repco	45.57%	36	79
38	Matra	44.75%	81	181
39	OSCA	43.75%	7	16
40	Bristol	42.55%	20	47
41	Honda	40.00%	84	210
41	Castellotti	40.00%	2	5
43	Climax	39.44%	312	791
44	Ford	39.39%	1786	4534
45	Mercedes	35.90%	14	39
46	TAG	35.34%	47	133
47	Ferrari	35.04%	376	1073
48	Porsche	18.99%	15	79

Finishing position: