Only title will suffice for Alonso

The Spaniard joins the British squad after having clinched two titles with the Renault team, and he is hoping to take McLaren back to winning ways after the team completed their first win-less season in a decade in 2006.

Despite that, Alonso says only the titles will suffice this year.

"To win the championships is the only answer to this question," said Alonso of his goals for 2007 on the day his team will unveil their new car at Valencia.

"After winning the last two championships you cannot arrive at the first race in 2007 hoping to be on the podium or in the points, you need to be the best.

"It is for this reason that I switched to McLaren Mercedes as we have the same targets for 2007. We both want to be world champions, I hope to have a car to become champion and I hope to help the team to take the constructors' title as well."

Alonso, who already tested for McLaren last year after Renault gave him permission to do it, says he is enjoying life at his new team.

"I think it will be a great relationship," the Spaniard added. "I am starting now to work with the team, I know more or less how they operate and most importantly I feel the passion of all the people working in the McLaren Technology Centre.

"You can tell straight away how motivated they are and focused on our challenge for the championships."

The two-time world champion will demonstrate the old MP4-21 car around the streets of Valencia tonight, before he begins serious testing with it.

"This will be the first time I have driven for Vodafone McLaren Mercedes in the team's livery with all the sponsors, so it will be an exciting time," he said.

"Being in my home country, the first time in public with my new team and also on the streets taking the cars so close to the fans will be a great day."