Virgin Media will offer 100 to 150Mbps broadband speeds up to two years before BT completes its rival fibre network.
“We have an opportunity with our network to provide significantly higher speeds,” Virgin Media’s chief executive Neil Berkett told BBC News.
BT has said its fibre network will hit the first crop of UK cities by early 2010 and will be complete by 2012.
Virgin currently offers a top speed of 50Mbps while BT is pledging 40 to 60Mb.
Mr Berkett said its fibre to the cabinet (FTTC) network was capable of supporting up to 200Mbps but roll out of higher speeds was a “function of timing”.
He said: “When we look at the market I don’t see us getting the returns right now for 100 or 150Mbps.