Races in calendar week 40/2005
All motorsport events on the weekend of 7–9 Oct 2005.
| Circuit | Country | Series |
|---|---|---|
| Adria |  Italy |
|
| Bathurst |  Australia |
|
| Danville (Virginia Raceway) |  USA |
|
| Lausitz |  Germany |
|
| Monza | Italy |
|
| Oschersleben | Germany |
|
| Silverstone |  Great Britain |
|
| Suzuka |  Japan |
|
| Viamao (Taruma) |  Brazil |
|