Ron Dennis says McLaren's partnership with Honda is stronger because of its struggles in 2015 and insists the team "remains resolute" in its desire to win again.
McLaren and Honda struggled in 2015, scoring just 27 points as it finished ninth in the championship. On Sunday the team released images of its 2016 car, the MP4-31, a day before winter testing begins in Barcelona.
Dennis stops short of making lofty predictions for McLaren this season but makes it clear the team's resolve has been hardened by the shared experience last year.
"As we embark on the second year of our renewed McLaren-Honda partnership, all of us remain united in our purpose," Dennis said. "That purpose is to develop our team towards our shared ambition: to win.
"We'll make no predictions as to when those wins will come, but I can say without fear of contradiction that every member of our team has worked with truly relentless dedication over the past few months. The result is that MP4-31's developmental trajectory has been usefully steepened over the winter, and I'm consequently very proud of our team's efforts.
"We remain resolute in our commitment to our goals, and we maintain an indefatigable commitment to the winning potential of a full works team. Believe me: the full works backing of a multinational automotive manufacturer is the only platform from which real success in modern Formula One can be achieved. As McLaren-Honda, therefore, we've vowed to work together, and to win together, and that determination has become further cemented as our relationship has deepened through the shared challenges we faced last year."
He also praised the team's driver line-up of Fernando Alonso and Jenson Button, both former world champions, and says he rates them as the best pairing in the sport.
"We have the best driver line-up in the sport. We have an engineering team that has been meticulously hand-picked, restructured, guided and inspired; the blend of technical skill-sets and attitudinal mind-sets we now possess are fit-for-purpose and state-of-the-art. And, thanks to the relationships we've nurtured with a hugely impressive roster of loyal and powerful partners, our commercial position is equally robust."