F1 power unit rule change hangs in the balance as Audi and Ferrari push back

A planned shift to a 60:40 power output split between the internal combustion engine and battery for 2027 – aimed at eliminating lift-and-coast driving – is now under threat. Audi and Ferrari have voiced opposition, preventing the supermajority needed on the Power Unit Advisory Committee to push the change through. Williams team principal James Vowles has offered a behind-the-scenes view of the tense negotiations.

Why it matters:

The rule change is crucial for improving Formula 1 racing by ensuring drivers can run full throttle more often, reducing the artificial energy management that has plagued the hybrid era. Without agreement, the sport risks stagnation and a continued reliance on inefficient driving styles.

The details:

• The proposal, agreed in principle at the Miami GP, would shift from the current 50:50 ratio to a 60:40 split favoring the internal combustion engine.
• To pass, four of the five power unit manufacturers (Audi, Honda, Ferrari, Mercedes HPP, and Red Bull Powertrains) must agree, alongside the FIA and F1. Mercedes and RBPT are in favor; Honda is open; Audi and Ferrari are against.
• Vowles explained the root of the disagreement: "Some PU manufacturers are not able to react as quickly as others… You are ordering a component 12 to 18 months in advance, so it is hard for them to directionally change that quickly."
• The most efficient way to achieve the 60:40 split is to increase fuel flow, requiring bigger fuel tanks and chassis adjustments – a point that has caused concern but Vowles believes can be resolved without compromising teams carrying over chassis.

What's next:

Further talks are scheduled, with a key meeting held at the Canadian GP. The aim is to find a compromise that balances the capabilities of all manufacturers. Vowles remains optimistic: "We all recognize we're not where we want to be yet… but we are moving in the right direction." A decision must be reached soon to allow time for development.