PORSCHE RACING HISTORY1978 - Silverstone 6 Hours
14 May 1978 - Silverstone Circuit, United Kingdom
Jochen Mass and Jacky Ickx win in a Porsche 935/78
Overall - 1st, 2nd : Gr.5 - 1st, 2nd : GT - 1st, 2nd, 3rd
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 1 | Porsche 935/78 | 935-006 | Gr.5 | Jochen Mass (B)/Jacky Ickx (B) | Martini Porsche (D) | 1st | 1st | 1st | 236 laps |
| 8 | Porsche 935/77A | 930 890 0022 | Gr.5 | Bob Wollek (F)/Henri Pescarolo (F) | Porsche Kremer Racing (D) | 2nd | 2nd | 3rd | 229 laps |
| 9 | Porsche 935 K2 | 007 00016 | Gr.5 | Dieter Schornstein (D)/"John Winter" Louis Krages (D)/Bob Wollek (F) | Porsche Kremer Racing (D) | 5th | 5th | 8th | 219 laps |
| 11 | Porsche 935/77A | 930 890 0014 | Gr.5 | Franz Konrad (A)/Volkert Merl (D) | Konrad Racing (D) | 6th | 6th | 7th | 203 laps |
| 25 | Porsche 934 | 006 00022 | GT | Eberhard Sindel (D)/Preben Kristoffersen (DK) | Wrangler Racing Team (DK) | 7th | 1st | 20th | 198 laps |
| 24 | Porsche 934 | 930 670 0162 | GT | Angelo Pallavicini (CH)/Peter Bernhard (CH) | Pallvano Corse (CH) | 8th | 2nd | 23rd | 195 laps |
| 31 | Porsche 911 Carrera RSR | 911 460 9075 | GT | Martin Raymond (GB)/John Beasley (GB)/Simon Phillips (GB) | Simon Phillips (GB) | 9th | 3rd | 21st | 191 laps |
| 32 | Porsche 911 Carrera RSR | Gr.5 | Bob Neville (GB)/Tony Wingrove (GB)/Pete Lovett (GB) | Charles Ivey Engineering (GB) | 10th | 7th | 28th | 190 laps | |
| 10 | Porsche 935 2.0 | Gr.5 | Kurt Simonsen (S)/Jan Lundgardh (S) | Team Vastkustugan (S) | 11th | 8th | 26th | 187 laps | |
| 35 | Porsche 911 Carrera RSR | GT | Georges Bourdillat (F)/Alain-Michel Bernard (F) | ASA Cachia | 12th | 4th | 29th | 184 laps | |
| 17 | Porsche 935 | 930 670 0540 | Gr.5 | Mike Franey (GB)/Klaus Drees (D) | Klaus Drees (D) | 14th | 9th | 14th | 183 laps |
| 22 | Porsche 934 | 930 670 0155 | GT | Kenneth Leim (S)/Lella Lombardi (I) | Kenneth Leim (S) | 15th | 5th | 22nd | 178 laps |
| 5 | Porsche 935/77A | 930 890 0011 | Gr.5 | Toine Hezemans (NL)/Hans Heyer (D)/John Fitzpatrick (GB) | Gelo Racing Team (D) | 16th | 10th | 5th | 178 laps - Oil Leak |
| 28 | Porsche 934 | GT | Jacques Guérin (F)/Jean-Pierre Delaunay (F)/Claude Haldi (CH) | Meccarillos Racing (CH) | DNF | 24th | 140 laps - Spun | ||
| 4 | Porsche 935/77A | 930 890 0020 | Gr.5 | Klaus Ludwig (D)/Hans Heyer (D)/Derek Bell (GB) | Gelo Racing Team (D) | DNF | 4th | 111 laps - Seized Wheel Stud | |
| 6 | Porsche 935/77A | 930 890 0015 | Gr.5 | John Fitzpatrick (GB)/Toine Hezemans (NL) | Gelo Racing Team (D) | DNF | 2nd | 95 laps - Accident | |
| 15 | Porsche 935 | 930 770 0904 | Gr.5 | Claude Haldi (CH)/Herbert Müller (CH) | Meccarillos Racing (CH) | DNF | 10th | 66 laps - Accident Damage | |
| 23 | Porsche 934 | 930 670 0168 | GT | Edgar Dören (D)/Gerhard Holup (D) | Autohaus Max Moritz (D) | DNF | 19th | 55 laps - Accident | |
| 14 | Porsche 935 | 930 770 0902 | Gr.5 | Carlo Facetti (I)/Martino Finotto (I) | Jolly Club (I) | DNF | 9th | 24 laps - Lost Wheel | |
| 16 | Porsche 935 | 930 770 0912 | Gr.5 | Jean-Louis Lafosse (F)/Michel Leclère (F) | A.S.A. Cachia (F) | DNF | 12th | 24 laps - Lost Wheel |
World Championship for Makes Silverstone 6 Hours
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