Gran Turismo 5 has barely been on the shelves for five minutes but word already reaches Autoblog UK of a pretender to the gaming throne. A teaser trailer for Forza Motorsport 4 - arguably the Xbox equivalent of the Playstation-only GT5 - has appeared on the internet, with a launch date pencilled in for Autumn next year.

There are no details yet available for the game, and the trailer has no in-game footage to speak of, but the makers of Forza will no doubt have GT5 firmly in their sights as they seek to offer driving fans an Xbox driving title to be proud of. Click below to watch the video.