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	Hart	57.71%	202	350
26	Alta	57.69%	45	78
27	Zakspeed	54.81%	57	104
28	Aston Martin	54.55%	6	11
29	Offenhauser	53.28%	187	351
30	Megatron	53.19%	50	94
31	Maserati	50.84%	272	535
32	Plate	50.00%	4	8
32	Speluzzi	50.00%	1	2
34	Talbot	49.38%	40	81
35	Peugeot	49.02%	50	102
36	BRM	47.91%	366	764
37	Yamaha	47.83%	110	230
38	Ilmor	47.50%	76	160
39	Repco	45.57%	36	79
40	Matra	44.75%	81	181
41	OSCA	43.75%	7	16
41	Osella	43.75%	7	16
43	Lamborghini	42.58%	109	256
44	Bristol	42.55%	20	47
45	Renault	42.09%	386	917
46	Judd	40.94%	165	403
47	Mercedes	40.71%	57	140
48	Castellotti	40.00%	2	5
49	Mugen-Honda	39.76%	66	166
50	Climax	39.44%	312	791
51	Ford	39.32%	2428	6175
52	Ferrari	37.77%	551	1459
53	TAG	36.30%	49	135
54	Honda	35.39%	155	438
55	Petronas	25.00%	1	4
56	Porsche	21.98%	20	91

Finishing position: