Fernando Alonso says the McLaren-Honda partnership has given him a new motivation boost after so many years in Formula One.
The Spanish driver is rejoining the Woking team after four years at Ferrari, with which he endured a poor 2014 season, his first without a victory since 2009.
Alonso admits he is fired up by the new challenge with what he says is the best possible team in Formula One.
After many years in Formula One I feel again the new motivation and the adrenaline of competing with the best possible team.
"It is a very challenging time for all of us, trying to succeed with his project," said Alonso during a Honda press conference in Japan.
"I'm very excited to be part of the McLaren-Honda family.
"After many years in Formula One I feel again the new motivation and the adrenaline of competing at the maximum level with the best possible team."
Dennis has no doubts
Team boss Ron Dennis insisted he has no doubts the McLaren-Honda relationship will succeed once again, although he admitted results may take some time to come.
"We are ready for the challenge, and we will have success because history shows that Honda always succeeds, and the Honda-McLaren partnership of the 80s is something that we intend to reproduce," said Dennis.
"I hope in the not too distant future we'll be celebrating that world championships that I'm very confident that we will win together, given some time.
"The first challenge is to win the first grand prix and in the short term compete in Australia, finish with the most competitive result that we can possibly have."