Dynamic Weather System: Now racing through a track can mean facing an unexpected rain storm or snow flurries in the middle of a race. This results in changing physics when powering around a corner on the wet or icy surface in Shanghai and St. Petersburg or any of the game's 10 other locations.
Flair & Driving Style: Pass your opponent at full speed as you pump your fists and exhibit more emotion as you earn recognition with the revised Kudos system. The Kudos will be worthwhile too, because the new A.I. personalities will be able to perform bold new driving maneuvers as they race side by side with other drivers.
120+ Iconic Vehicles: More than 120 iconic vehicles, including motorcycles, from the world's top manufacturers. PGR4 puts gamers behind the wheel of the world's most iconic cars, including the 1957 Maserati 250F, 1963 Chevrolet Corvette Sting Ray, 1978 Lamborghini Countach LP400, 1993 Toyota Supra Turbo, and 2006 Ferrari 599 GTB Fiorano. In addition, for the first time motorcycles from top manufacturers, such as Ducati, BMW and Honda, will be included in the game. Whether in single-player mode or playing with a team of up to seven other drivers, players can choose to race two motorcycles side by side or race with a combination of cars and motorcycles. The game's unique physics engine enables drivers to pull off incredible driving maneuvers not found in any other racing game.
Xbox LIVE gameplay: PGR4 sets a new standard for racing on Xbox LIVE, allowing drivers to build a global racing community through team-orientated gameplay while making it easy to find their favorite races or images.