The 1985 Silverstone 1000 km was the third round of the 1985 World Endurance Championship. It took place at the Silverstone Circuit, Great Britain on 12 May 1985.

Class winners in bold. Cars failing to complete 75% of the winner's distance marked as Not Classified (NC).

Pos	Class	No	Team	Drivers	Chassis	Tyre	Laps
					Engine
1	C1	1	Rothmans Porsche	Jochen Mass Jacky Ickx	Porsche 962C	D	212
					Porsche Type-935 2.6 L Turbo Flat-6
2	C1	2	Rothmans Porsche	Hans-Joachim Stuck Derek Bell	Porsche 956	D	211
					Porsche Type-935 2.6 L Turbo Flat-6
3	C1	4	Martini Racing	Riccardo Patrese Alessandro Nannini	Lancia LC2	M	210
					Ferrari 308C 3.0 L Turbo V8
4	C1	10	Porsche Kremer Racing	Manfred Winkelhock Marc Surer	Porsche 962C	G	210
					Porsche Type-935 2.6 L Turbo Flat-6
5	C1	14	Richard Lloyd Racing	Jonathan Palmer Jan Lammers	Porsche 956 GTi	G	207
					Porsche Type-935 2.6 L Turbo Flat-6
6	C1	7	New Man Joest Racing	Klaus Ludwig Paolo Barilla Paul Belmondo	Porsche 956	D	206
					Porsche Type-935 2.6 L Turbo Flat-6
7	C1	26	Obermaier Racing Team	Jürgen Lässig Jesús Pareja Hervé Regout	Porsche 956	G	204
					Porsche Type-935 2.6 L Turbo Flat-6
8	C1	11	Porsche Kremer Racing	Sarel van der Merwe George Fouché Almo Coppelli	Porsche 956B	G	195
					Porsche Type-935 2.6 L Turbo Flat-6
9	C2	79	Ecurie Ecosse	Ray Mallock Mike Wilds	Ecosse C285	A	193
					Ford Cosworth DFV 3.0 L V8
10	C1	19	Brun Motorsport	Walter Brun Thierry Boutsen	Porsche 962C	D	193
					Porsche Type-935 2.6 L Turbo Flat-6
11	C2	70	Spice Engineering	Gordon Spice Ray Bellm	Tiga-Spice GC85	A	189
					Ford Cosworth DFL 3.3 L V8
12	C1	5	Martini Racing	Mauro Baldi Bob Wollek	Lancia LC2	M	188
					Ferrari 308C 3.0 L Turbo V8
13	C2	97	Strandell Motors	Stanley Dickens Martin Schanche	Strandell 85	A	176
					Porsche Type-934 3.3 L Turbo Flat-6
14	C2	72	Gebhardt Engineering	Nick Adams Frank Jelinski John Graham	Gebhardt JC853	A	174
					Ford Cosworth DFV 3.0 L V8
15	C2	88	Arthur Hough Pressings Ark Racing	David Andrews Chris Ashmore Max Payne	Ceekar 83J	A	173
					Ford Cosworth BDX 2.0 L I4
16	C2	86	Mazdaspeed Co. Ltd.	Yojiro Terada David Kennedy	Mazda 737C	D	173
					Mazda 13B 1.3 L 2-Rotor
17	C2	80	Carma F.F.	Carlo Facetti Martino Finotto Guido Daccò	Alba AR2	A	164
					Carma FF 1.9 L Turbo I4
18	C2	81	Carma F.F.	Loris Kessel Jean-Pierre Frey	Alba AR6	A	158
					Carma FF 1.9 L Turbo I4
19 DNF	C2	85	Mazdaspeed Co. Ltd.	Yoshimi Katayama Takashi Yorino	Mazda 737C	D	174
					Mazda 13B 1.3 L 2-Rotor
20 DNF	C1	18	Brun Motorsport	Oscar Larrauri Massimo Sigala	Porsche 956	D	172
					Porsche Type-935 2.6 L Turbo Flat-6
21 DNF	C1	69	Richard Lloyd Racing	James Weaver Vern Schuppan	Porsche 956	G	150
					Porsche Type-935 2.6 L Turbo Flat-6
22 DNF	C2	75	ADA Engineering	Ian Harrower Mark Galvin Steve Earle	Gebhardt JC843	A	135
					Ford Cosworth DFL 3.3 L V8
23 DNF	C1	33	John Fitzpatrick Racing	Jo Gartner David Hobbs	Porsche 956B	Y	106
					Porsche Type-935 2.6 L Turbo Flat-6
24 DNF	C2	90	Jens Winther Castrol Denmark	Jens Winther David Mercer	URD C83	A	75
					BMW M88 3.5 L I6
25 DNF	C1	66	EMKA Productions Ltd.	Steve O'Rourke Tiff Needell Bob Evans	EMKA C84	D	70
					Aston Martin-Tickford 5.3 L V8
26 DNF	C1	55	John Fitzpatrick Racing	Dudley Wood Guy Edwards Manuel López	Porsche 956	Y	37
					Porsche Type-935 2.6 L Turbo Flat-6
27 DNF	C2	82	Grifo Racing	Paolo Giangrossi Pasquale Barberio Maurizio Gellini	Alba AR3	D	36
					Ford Cosworth DFL 3.3 L V8
28 DNF	C1	23	Cheetah Automobiles Switzerland	John Cooper John Brindley	Cheetah G604	D	34
					Aston Martin-Tickford 5.3 L V8
29 DNF	C2	67	Spice Engineering	Tim Lee-Davey Neil Crang	Tiga GC84	A	28
					Ford Cosworth DFL 3.3 L V8
30 DNF	C2	98	Roy Baker Promotions	Thorkild Thyrring Will Hoy	Tiga GC284	A	14
					Ford Cosworth BDT 1.8 L Turbo I4
31 DNF	C1	31	Primagaz Sovico	Pierre-François Rousselot Pierre Yver Jean Rondeau	Rondeau M382	D	8
					Ford Cosworth DFV 3.0 L V8

• Pole Position - #4 Martini Racing - 1:10.84
• Fastest Lap - #14 Richard Lloyd Racing - 1:15.96
• Average Speed - 204.115 km/h