Audi has the ambitious plan of hanging four cars off the Sydney Harbour Bridge as part of a global advertising campaign.

Sydney's famous Harbour Bridge.

British tourists have voted Sydney as their favourite city, ahead of popular holiday spots New York and Paris.

NSW Tourism Minister George Souris said Sydney was voted the world's favourite overseas city in the 15th annual Conde Nast Traveller, UK Readers Choice Awards held in London.

"Winning this latest award demonstrates Sydney's continuing appeal to visitors across the UK," Mr Souris said today in a statement.

Britain is one of NSW's largest international tourism markets, worth more than $557 million to the state economy, he said.

NSW annually receives 313,600 UK visitors, the third largest group behind Chinese and New Zealand tourists.

AAP