Honda admits Aston Martin transition has exposed major F1 power unit challenges

Honda faces pressure after Aston Martin switch

Honda Racing Corporation president Koji Watanabe has underlined the scale of the challenge facing the manufacturer after its move from Red Bull to Aston Martin produced a far more difficult start than many had expected.

Instead, the early picture has been starkly different. Honda’s current power unit is regarded as the weakest on the grid by a considerable margin and has also proved the least reliable. In a landscape where engine performance has become a decisive battleground, the situation has placed immediate pressure on Honda to respond.

Watanabe points to a completely new environment

Watanabe stressed that comparisons with Honda’s Red Bull period must be made carefully, because almost every major element around the project has changed.

“It is important to recognise that the current situation is fundamentally different from the time we worked together with Red Bull,” Watanabe told F1.

He highlighted the difficulty of the regulation shift, the new works relationship with Aston Martin, and the introduction of new fuel and lubricant partners.

“The regulation is quite difficult, it is a new partnership with Aston Martin, the fuel is Aramco – and a new partner – and the lubricant is Valvoline, [which is also] new. So everything [is] new for us and it’s not easy.”

That explanation is significant because it frames Honda’s decline not as one isolated weakness, but as the result of several simultaneous transitions. A new team, new technical ecosystem and new operational structure have all arrived together.

Delayed development adds to Honda’s task

Another important factor is Honda’s previous withdrawal from Formula 1 at the end of 2021. Although Red Bull continued to run Honda engines during Verstappen’s dominant spell, the Japanese manufacturer only remained involved through technical support.

Watanabe revealed that Honda took 18 months to decide on its 2026 return, delaying the early development of the power unit now used by Aston Martin.

“The recovery from the delay caused by our previous withdrawal has taken time,” he said.

“So the late start of development, as well as the time required to rebuild necessary capacities and capabilities and bring back the required talent have been a significant factor.”

For Aston Martin, backed by Lawrence Stroll’s investment, the expectation remains clear: Honda must turn a troubled start into a credible recovery. Watanabe’s comments make equally clear that the route back will depend on rebuilding momentum across performance, reliability and the wider partnership structure.