Retirement Ratio

until 1958 Indianapolis 500

Ignore Indy 500 races
Ignore non-championship races
Note: records involving non-championship races may be inaccurate due to incomplete data.

Finishing position:

Pos	Engine Manufacturer	Retirement Ratio	Retirements	Entries
1	Emeryson	100.00%	3	3
	Cummins	100.00%	2	2
	Platè	100.00%	2	2
	Studebaker	100.00%	2	2
	Ardun	100.00%	1	1
	CTA	100.00%	1	1
	Dodge	100.00%	1	1
	Giaur	100.00%	1	1
	GK	100.00%	1	1
	Guyot	100.00%	1	1
	Jicey	100.00%	1	1
	Lombard	100.00%	1	1
	MacKay	100.00%	1	1
	Orley	100.00%	1	1
	Patterson	100.00%	1	1
	Pozzoli	100.00%	1	1
	PS	100.00%	1	1
	Stanguellini	100.00%	1	1
	Summer	100.00%	1	1
20	AFM	87.50%	7	8
21	Hudson	75.00%	3	4
22	Citroën	62.50%	10	16
23	Francis	61.76%	21	34
24	Salmson	60.00%	9	15
	Novi	60.00%	6	10
	Singer	60.00%	3	5
27	Vanwall	57.58%	38	66
28	BRM	56.14%	32	57
29	Milano	55.56%	5	9
30	Veritas	55.17%	48	87
31	Jaguar	54.55%	6	11
32	Offenhauser	53.52%	152	284
33	Lancia	51.43%	18	35
34	Talbot	50.00%	41	82
	Fiat	50.00%	9	18
	Plate	50.00%	4	8
	Steyr	50.00%	2	4
	Allard	50.00%	1	2
	BNC	50.00%	1	2
	de Coucy	50.00%	1	2
	Monaci	50.00%	1	2
42	Simca-Gordini	49.70%	83	167
43	Gordini	49.14%	114	232
44	Bugatti	49.09%	27	55
45	MG	44.19%	19	43
46	JAP	43.90%	18	41
47	Cisitalia	42.74%	50	117
48	Maserati	42.53%	555	1305
49	Kuchen	40.00%	4	10
50	Alta	38.26%	145	379
51	Kollektiv	37.50%	3	8
52	ERA	37.00%	84	227
53	Butterworth	36.84%	7	19
54	Amilcar	36.00%	9	25
55	BMW	35.29%	60	170
56	Frazer-Nash	34.04%	16	47
57	Buick	33.33%	1	3
	Cadillac	33.33%	1	3
	Rapier	33.33%	1	3
	Speluzzi	33.33%	1	3
61	Riley	32.69%	17	52
62	Ferrari	32.69%	236	722
63	Mercedes	32.56%	14	43
64	Delage	31.94%	23	72
65	Talbot-Lago	31.55%	106	336
66	DB	30.00%	3	10
67	Simca	29.41%	10	34
68	Rover	28.57%	2	7
69	Aston Martin	26.32%	5	19
70	Bristol	25.50%	76	298
71	Alfa Romeo	25.32%	40	158
72	OSCA	25.00%	10	40
	Alvis	25.00%	1	4
	Lagonda	25.00%	1	4
75	Climax	24.77%	54	218
76	Lea-Francis	24.17%	29	120
77	Delahaye	22.90%	30	131
78	Connaught	20.90%	28	134
79	Ford	20.83%	5	24
80	Porsche	20.00%	1	5
80	Vincent	20.00%	1	5
82	Panhard	16.67%	1	6
83	Peugeot	7.14%	1	14

Finishing position: