An advanced player will be able to judge his performance by the realistic lap times. According to the developers, a professional driver was invited to set times using the same car on the Nurburgring Nordschleife circuit, and the GT4 lap times were within 2% of the real life equivalent.

Carmen Electra (born April 20, 1972) is an American model, television personality, actress and singer, born in Cincinnati, Ohio, as Tara Leigh Patrick. (She is not related to adult film actress Tera Patrick, born Linda Hopkins Shapiro.)

The game was released in the last week of December in Asia, with a March 2005 date scheduled for the rest of the world. The online component, originally intended, was removed for the Asian release and it is unclear whether the feature will be available for the RotW release (Sony has not publically stated either way).