Honda boss Masashi Yamamoto admits his company's working relationship with "systematic" McLaren was difficult.
McLaren confirmed on Friday that the team will end their agreement with engine partner Honda at the end of the season, bringing to an end a disastrous partnership that failed to deliver a single podium finish in three seasons.
Yamamoto hints that the problem was at McLaren's end, accusing the Woking-based team of struggling to keep up with the changing world of F1.
"Working with McLaren, I've realised that they are a very big company which is very systematic," Yamamoto told the Honda Racing website.
"It's obviously very strong because of that but at the same time they can find it hard to adapt to change."
Honda have now signed a deal to supply engines to Toro Rosso from 2018, and Yamamoto expects a smoother relationship with Red Bull's junior partner team, and with Toro Rosso team principal Franz Tost.
"Compare that to Toro Rosso, it is a company that is growing," he continued.
"It is very important for us to work in partnership together, heading towards the same goal.
"So for us we are very much looking forward to being able to work closer.
"We have seen that they also have a young factory and are growing, which for Honda is very important because we can work with the same mentality and have the same approach.
"It is a new start with a team with a similar mindset to move forwards together."
Yamamoto hopes Honda can rebuild its' reputation in F1 by making a success of the partnership with Toro Rosso, and potentially creating a tie-in with Red Bull from 2019.
"The regulations go on until 2020 so we still have three years and we want to show our improvements in the technology. We want to show Honda's potential," he said.
"That is very important for us, to let the world see how we will progress and how we can make it a success."
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