The 2005 FIA GT RAC Tourist Trophy was the third race for the 2005 FIA GT Championship season, and was the first time the RAC Tourist Trophy was held as a round of the FIA GT Championship. It took place on 15 May 2005 at the Silverstone Circuit.
The Aston Martin DBR9 made its debut in the FIA GT Championship here. However, since both cars were entered by the factory, they were ineligible for scoring points.
Class winners in bold. Cars failing to complete 70% of winner's distance marked as Not Classified (NC).
| Pos | Class | No | Team | Drivers | Chassis | Tyre | Laps |
|---|---|---|---|---|---|---|---|
| Engine | |||||||
| 1 | GT1 | 29 |  Aston Martin Racing † |  Peter Kox  Pedro Lamy | Aston Martin DBR9 | M | 134 |
| Aston Martin 6.0L V12 | |||||||
| 2 | GT1 | 28 | Aston Martin Racing † |  David Brabham Darren Turner | Aston Martin DBR9 | M | 134 |
| Aston Martin 6.0L V12 | |||||||
| 3 | GT1 | 10 |  Vitaphone Racing Team |  Fabio Babini Thomas Biagi | Maserati MC12 GT1 | P | 134 |
| Maserati 6.0L V12 | |||||||
| 4 | GT1 | 15 |  JMB Racing | Andrea Bertolini  Karl Wendlinger | Maserati MC12 GT1 | P | 133 |
| Maserati 6.0L V12 | |||||||
| 5 | GT1 | 9 | Vitaphone Racing Team | Michael Bartels Timo Scheider | Maserati MC12 GT1 | P | 133 |
| Maserati 6.0L V12 | |||||||
| 6 | GT1 | 11 |  Larbre Compétition |  Gabriele Gardel Fabrizio Gollin | Ferrari 550-GTS Maranello | M | 133 |
| Ferrari 5.9L V12 | |||||||
| 7 | GT1 | 2 | GPC Sport | Jean-Denis Délétraz Andrea Piccini | Ferrari 575-GTC Maranello | P | 132 |
| Ferrari 6.0L V12 | |||||||
| 8 | GT1 | 16 | JMB Racing | Philipp Peter Chris Buncombe  Roman Rusinov | Maserati MC12 GT1 | P | 132 |
| Maserati 6.0L V12 | |||||||
| 9 | GT2 | 66 | GruppeM Racing | Marc Lieb Mike Rockenfeller | Porsche 911 GT3-RSR | M | 129 |
| Porsche 3.6L Flat-6 | |||||||
| 10 | GT1 | 8 | Graham Nash Motorsport | Luca Pirri-Ardizzone Marco Panzavuota Ryan Hooker | Saleen S7-R | P | 127 |
| Ford 7.0L V8 | |||||||
| 11 | G2 | 101 | Balfe Motorsport | Shaun Balfe Jamie Derbyshire | Mosler MT900R | D | 126 |
| Chevrolet LS1 5.7L V8 | |||||||
| 12 | GT1 | 17 | Russian Age Racing | Christophe Bouchut Nikolai Fomenko Alexey Vasilyev | Ferrari 550-GTS Maranello | M | 126 |
| Ferrari 5.9L V12 | |||||||
| 13 | GT2 | 55 | Embassy Racing | Ben Collins  Neil Cunningham | Porsche 911 GT3-RSR | D | 125 |
| Porsche 3.6L Flat-6 | |||||||
| 14 | GT2 | 80 | Team LNT | Lawrence Tomlinson Jonny Kane | TVR Tuscan T400R | D | 124 |
| TVR Speed Six 4.0L I6 | |||||||
| 15 | GT1 | 7 | Graham Nash Motorsport | Paolo Ruberti Joël Camathias | Saleen S7-R | P | 124 |
| Ford 7.0L V8 | |||||||
| 16 | G2 | 102 | Eclipse Motorsport | Phil Keen Nigel Taylor | Mosler MT900R | D | 122 |
| Chevrolet LS1 5.7L V8 | |||||||
| 17 | GT2 | 86 | GPC Sport | Gabrio Rosa Luca Drudi | Ferrari 360 Modena GTC | P | 122 |
| Ferrari 3.6L V8 | |||||||
| 18 | GT2 | 69 | Proton Competition | Christian Ried Gerold Ried | Porsche 911 GT3-RSR | D | 121 |
| Porsche 3.6L Flat-6 | |||||||
| 19 | GT2 | 88 | GruppeM Racing | Emmanuel Collard Tim Sugden | Porsche 911 GT3-RSR | M | 121 |
| Porsche 3.6L Flat-6 | |||||||
| 20 | GT2 | 84 | Sebah Automotive, Ltd. |  Lars-Erik Nielsen Pierre Ehret | Porsche 911 GT3-RSR | D | 120 |
| Porsche 3.6L Flat-6 | |||||||
| 21 | GT2 | 85 | Cirtek Motorsport |  Stefan Eriksson Joe Macari | Ferrari 360 Modena GTC | D | 119 |
| Ferrari 3.6L V8 | |||||||
| 22 | GT2 | 56 |  Czech National Team | Jan Vonka Mauro Casadei | Porsche 911 GT3-RS | D | 118 |
| Porsche 3.6L Flat-6 | |||||||
| 23 | G2 | 104 | Cadena GTC | Barrie Whight Paul Whight Gavan Kershaw | Mosler MT900R | D | 94 |
| Chevrolet LS1 5.7L V8 | |||||||
| 24 DNF | GT1 | 6 |  GLPK-Carsport | Bert Longin Anthony Kumpen Mike Hezemans | Chevrolet Corvette C5-R | M | 64 |
| Chevrolet LS7r 7.0L V8 | |||||||
| 25 NC | GT1 | 14 | Lister Storm Racing | Justin Keen  Liz Halliday | Lister Storm GT | D | 57 |
| Jaguar 7.0L V12 | |||||||
| 26 DNF | GT1 | 3 | GPC Sport |  Jaime Melo Jean-Philippe Belloc | Ferrari 575-GTC Maranello | P | 53 |
| Ferrari 6.0L V12 |
† – These entries are considered factory teams and thus do not score points for the championship.