Pre-orders for the PS3 version of Grand Theft Auto IV are outstripping the Xbox 360 version by 3:1 on the website of UK supermarket Asda.

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"Both titles have generated great interest on the Asda website, with strong pre-orders, and the PS3 version is selling three times that of 360, which is surprising and not in line with what we'd expect," said Asda's head of games to MCV.

Over the past two weeks, Microsoft has been aggressively promoting its console as the best way to experience Grand Theft Auto IV, producing TV spots and newspaper adverts in addition to Rockstar's own marketing blitz.

In contrast Sony has done very little. Even the GTA PS3 bundle seen all over the internet has yet to be officially confirmed.

[Via CVG]