Honda’s upgraded power unit has presented an unexpected challenge for Aston Martin during the 2026 Formula 1® season, particularly highlighted at the Singapore Grand Prix. Despite promising performances earlier in the year, the team encountered difficulties related to turbo lag, which affected the car’s driveability and overall race pace.
Following a strong weekend in Malaysia, Aston Martin entered Singapore with high hopes, expecting the AMR26 to perform well on the Marina Bay Street Circuit. However, the race weekend proved disappointing as turbo lag issues resurfaced despite Honda’s recent upgrades. Fernando Alonso pointed out that the power unit’s driveability was compromised, with the delay in turbo spool-up causing unstable acceleration during the race.
The problem was investigated thoroughly by Honda at their Sakura facility, where no hardware faults were found. The second ADUO upgrade, introduced in Madrid, included a new turbocharger designed to eliminate turbo lag, but the unique characteristics of the Singapore circuit, which demands high energy output and features a complex layout, made managing turbo lag particularly difficult. Honda’s chief trackside engineer, Shintaro Orihara, explained that while the MGU-K deployment helps reduce turbo lag, it is not sufficient on energy-rich circuits like Singapore where harvesting energy is limited.
Honda is focusing on software and operational setting improvements rather than hardware changes to address the turbo lag issue. The challenge lies in accurately simulating driveability problems like turbo lag, which complicates preparation and fine-tuning for specific circuits. Aston Martin’s chief trackside officer, Mike Krack, acknowledged that the team learned a mental lesson about managing expectations and coping with the emotional impact of underperformance during the Singapore weekend.
The situation underlines how certain technical challenges in Formula 1® can be circuit-specific and not always resolved by hardware upgrades alone. Turbo lag, while partially mitigated by energy recovery systems, remains a complex issue when combined with the demands of energy-rich tracks. Aston Martin and Honda continue to work together on refining the power unit’s software to improve driveability and performance in similar conditions.
This episode highlights the intricate balance between power unit development and circuit characteristics in Formula 1®. It also reflects the ongoing efforts by manufacturers and teams to adapt to the evolving technical landscape of the championship while managing the expectations of drivers and fans alike.