Ralf Schumacher said he has decided to leave Williams for Toyota because he was excited about the big-budget Japanese team's prospects.
Schumacher is optimistic about Toyota's prospects
Schumacher will join Toyota in 2005 after six seasons at Williams.
"It will take some time no doubt, but on the other hand tell me a team you can go to and win a world title apart from Ferrari," the German said.
"The possibilities (are good) - they have good people and a good budget and there is clearly something to come."
Toyota are reputed to have the second biggest budget in F1 after Ferrari and have made no secret of their willingness to do whatever it takes to win the world championship.
They already have an engine that is reputed to be among the best, and they have recruited wisely to bring their chassis design up to the same level.
Next year will be the first time they will start a season with a car designed under the stewardship of their new technical director Mike Gascoyne.
The Englishman is highly regarded in F1 after turning first Jordan and then Renault into winners.
Schumacher said he believes Toyota can make it right to the top, and rejected suggestions he was trying to copy his brother Michael, who moved to Ferrari when they were uncompetitive and helped make them a major force.
"It will be a great project together," Ralf said.
"It is nothing to do with trying to copy something it's just that after six years I want to try something new.
"They are a very young team and it is very interesting to be able to join and be involved a lot more and have a better chance of success."
Schumacher is out of the cockpit following back injuries sustained in a high-speed crash in the US Grand Prix in June, but said he was hopeful of being back for Williams at the Hungarian Grand Prix next month.