Honda entered Formula 1’s new era believing it had built the foundations of a competitive power unit for Aston Martin. Then came the cold reality of January.
When Lawrence Stroll’s outfit aligned itself with the Japanese manufacturer for the sport’s sweeping 2026 engine regulations, backing the project with a state-of-the-art factory and the design genius of Adrian Newey, the pairing looked highly impressive.
Behind closed doors, initial simulation metrics had looked promising enough to sustain optimism. Yet as the winter deadline crept closer, crackling instabilities began to surface deep within the engine's architecture, shattering Honda's quiet confidence just weeks before track action began.
Trackside manager and chief engineer Shintaro Orihara recalled how the situation quickly unraveled.
“So, probably at the end of last year, our position was not so bad,” he said.
“Still, performance and drivability were in the development stage, but it looked okay. But in January, we realised that in some of the areas we found some, not issues, but we realised that performance was always up, down, up, down.
So we found some performance, but then we also found some reliability issues.”
Honda’s blow in Barcelona
Confronted with fragile components, engineers were forced into a desperate retreat, turning down performance targets to save the hardware. The true nightmare, however, was exposed the moment the car finally hit the asphalt for pre-season running.
"In January, we realised that our performance and reliability would not be competitive,” Orihara added.
“When we started running in Barcelona, we realised that our performance was definitely poor compared to the other manufacturers. And also, we found some issues on the battery side.”
©Aston Martin
The battery flaws devoured precious testing laps, leaving the team trailing nearly a second behind newcomers like Cadillac before the summer interval.
"So we realised that we were not in good position, maybe at beginning of this year. Last year, at end of last year, we already saw that we were not competitive, but we didn't expect it so bad," Orihara admitted.
The perfect storm
The sudden shortfall was not down to a single failing part, but rather the overwhelming strain of adapting to the sport's massive regulatory overhaul all at once.
"It's difficult to say which component of the power unit is most challenging because in this regulation, everything has changed a lot,” said Orihara.
“For example, MGU-K power changed from, let's say, [120] to 350 kilowatts. That is a significant change. But also on the internal combustion engine side, we have changed the fuel flow rate.
“So in this regulation, everything has been changed so much. So, a challenging point for Honda is just the combination of a lot of changes happening at the same time."
Beyond raw output, the removal of key hybrid components severely compromised how the engine delivered its energy out of corners.
"Removing the MGU-H has also been quite challenging on the power unit side,” he said.
“Probably that is the most exciting point for power unit manufacturers. I have always been mentioning drivability. That is, maybe not mainly, but the majority of that is coming from removing the MGU-H.
Read also: New Honda engine completes first laps during Aston filming day“So that is a challenging point for us as a power unit supplier, to keep the boost pressure at a target. Again, it's difficult to pick one component that has been most challenging for us, but it has been the combination of all changes at the same time."
With an internal combustion upgrade scheduled for Zandvoort, Honda is attempting to climb out of an unexpectedly deep abyss – knowing the road back to the top will be long and painfully arduous.
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