10th Place Finish Ratio

until 1988 Japanese GP

Include 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	10th Place Finish Ratio	10th Place Finishes	Entries
1	Simca-Deho	100.00%	1	1
2	Speluzzi	33.33%	1	3
3	DB	20.00%	2	10
3	RRA	20.00%	1	5
5	Borgward	15.62%	5	32
6	Aston Martin	13.89%	5	36
7	Fiat	10.53%	2	19
8	Scarab	9.09%	1	11
9	Rover	6.67%	1	15
10	Megatron	6.52%	6	92
11	BDA	6.25%	1	16
12	Simca	5.88%	2	34
13	Porsche	5.20%	9	173
14	Talbot	4.88%	4	82
15	Judd	4.44%	4	90
16	Connaught	4.35%	6	138
17	MG	4.08%	2	49
18	Amilcar	4.00%	1	25
18	Weslake	4.00%	1	25
20	Chevrolet	3.97%	18	453
21	Renault	3.87%	19	491
22	Bugatti	3.64%	2	55
23	BMW	3.28%	17	518
24	Ford	3.27%	172	5261
25	Alfa Romeo	3.18%	25	786
26	Delahaye	3.05%	4	131
27	Hart	2.69%	6	223
28	Climax	2.62%	55	2100
29	Alta	2.58%	10	387
30	Lea-Francis	2.50%	3	120
31	Maserati	2.47%	41	1658
32	JAP	2.44%	1	41
33	Talbot-Lago	2.36%	8	339
34	BRM	2.28%	26	1139
35	Vanwall	2.22%	2	90
36	Bristol	1.98%	6	303
37	Zakspeed	1.96%	2	102
38	Riley	1.85%	1	54
39	Simca-Gordini	1.80%	3	167
40	OSCA	1.79%	1	56
41	Cosworth	1.75%	16	915
42	Gordini	1.72%	4	232
43	Repco	1.66%	3	181
44	Matra	1.62%	3	185
45	Ferrari	1.35%	22	1635
46	Lotus	1.15%	1	87
46	Veritas	1.15%	1	87
48	Honda	1.08%	3	277
49	ERA	0.88%	2	227

Finishing position: