Codemasters has released a playable PC demo of Race Driver: GRID, offering 3 events to compete in. Word is: "Charge a Ford Mustang GTR muscle car through the iconic streets of San Francisco, race a BMW 320Si in the Jarama Touring Car Race and drift around the docks of Yokohama in a Nissan Silvia S15. Race against 11 friends on your favourite track and test your mettle online or prove yourself in the single player game."
The demo is 893MB.