The Telegraph has the story here. The main points are below.
The Treasury admitted on Wednesday that almost half of all drivers will be hit with significant rises in Vehicle Excise Duty (VED) on cars with larger engines.
Less than 20 per cent will be better off because of tax cuts on cars with lower emissions.
But only last month in the House of Commons, the Prime Minister told David Cameron, the Tory leader, that if he looked at the VED plan, "he will see that the majority of drivers will benefit from it."
George Osborne, the Tory shadow chancellor, has said that Mr Brown "misled" parliament, and called on the Prime Minister to explain his remark.