Honda motorsport general manager Masahasi Yamamoto says the Japanese manufacturer “must do better” in 2019 upon its expansion to a two-team supply in Formula 1.

2018 marked Honda’s most stable season since returning to F1 three years ago as it made rapid progress across the course of the year with new team partner, Toro Rosso.

Top 10 of F1 2018 Moments

The Toro Rosso partnership laid the foundations for Honda to strike a deal with its senior team, Red Bull, for 2019. It will be the first year in which Honda has supplied multiple F1 teams since 2008.

Reflecting on the 2018 season, while Yamamoto identified plenty of positives to take out of the burgeoning partnership with Toro Rosso, he stressed there was room for improvement heading into next year.

“Over the course of the year, we improved our power unit in terms of performance and reliability, thanks to the huge efforts of our engineers and mechanics,” Yamamoto said.

“Everyone at Scuderia Toro Rosso and both its drivers played a big part in our development, not just on the technical front, but also thanks to their open-minded and positive attitude and cheerful disposition. This was a great boost for all Honda members.

“We established a close and honest relationship, built on mutual respect and that produced some strong performances, such as those in Bahrain, Hungary and our qualifying in Suzuka. For this, our sincere thanks go to the entire team.

"However, it was clear that our PU is still not at the same level as the very best in terms of performance and there is also room for improvement when it comes to reliability.

“Next season, we will supply two teams for the first time since we returned to F1 in 2015. We must do better and, with that in mind, everyone involved in the project is working relentlessly to be in good shape for pre-season testing in February.

“As we prepare for our second year with Toro Rosso and our first with Red Bull Racing, our aim is to continue to make progress and move up the order."