A new update for Gran Turismo 5 Prologue is now available for download. This update adds three brand new vehicles to the game's line-up of cars, plus a number of gameplay and performance enhancements.

The most exciting part of this update is the addition of three new cars: and the "GT by Citroen" concept car from Citroen, the Ferrari California, and the Lotus Evora. These exciting cars will be added to their respective Dealership in the game. The “GT by Citroen” will be available for 1 million credits, the Ferrari California for 300,000 credits, and the Lotus Evora for 100,000 credits.

All three vehicles and manufacturers have special ties to Gran Turismo and Polyphony Digital. The "GT by Citroen" concept car is the culmination of a groundbreaking collaboration between French automaker Citroen and Polyphony Digital, with the formal debut of the vehicle taking place on October 2 at the Paris Motor Show, coinciding with the release of this update to the game. A video of the "GT by Citroen" can be viewed in the Media section, or downloaded and viewed in HD within Gran Turismo TV inside the game. The recent teaser video for the Ferrari California featured the car in virtual form, cruising around tracks in Gran Turismo 5 Prologue. The Lotus Evora was first shown on July 22, 2008 at the Press Day preceding the British International Motor Show, and on-hand were special kiosks featuring Gran Turismo 5 Prologue where visitors were given the chance to test drive the car in the game.

New gameplay enhancements include changes to the penalty system. During Time Trial events, speed penalties have been removed, and instead incurring such a penalty will now invalidate the lap time for that particular lap. Race events are also being updated, with tweaked difficulty levels and increased earnings for winning a top spot. Additionally, improved responsiveness when using the wireless controller, and improved sound volume balance for sound effects and music for a better racing experience. Drift Trial races have been changed to feature a rolling start.

Note that this update will require 116MB of space, in addition to previous update content. Also, note that once the update is live, rankings, arcade time trial times, drift trial records, as well as vehicle-specific quick tune settings and custom key layouts, will all be reset. Replay data created before the Spec II update will no longer be viewable after this update. To confirm the version you have before updating the game, check the in-game manual. Race replays created with Version 2.XX.X or later will not be affected by this update.