McLaren's Lewis Hamilton has ruled out challenging for victory on home soil at next month's British Grand Prix, insisting his car is simply not fast enough.

Hamilton struggled for pace at the European Grand Prix, finishing fourth to leave him 89 points adrift of leader Sebastian Vettel in the championship.

"I'm not looking forward to the race because when you go to Silverstone, the desire to win is even greater because it's my home country," said Hamilton.

"But we're just not quick enough to win there. I think we'll really struggle."

From the British Grand Prix onwards, the use of off-throttle blowing of diffusers, which help to increase downforce by blowing hot gases over the rear of the car's floor while the driver is not pressing the accelerator, will be banned.

While nobody knows for sure how the ban will affect the pecking order, Hamilton is downbeat about the impact the ban will have on his team.

"I'm really not looking forward to it," added the 26-year-old Englishman, who finished second behind Mark Webber at last year's British Grand Prix.

"Of course, I'm really looking forward to seeing the fans because they always put a spark in the weekend and make it that much brighter.

"And I'll be going there as prepared as I can, racing as fast as I can, but we're not fast enough.