FIA and teams agree to bring forward first ADUO engine performance assessment

Formula 1's governing body and the teams have agreed to move the first performance assessment for engine upgrades forward by one race, allowing manufacturers with a significant deficit to introduce updates after the Canadian Grand Prix instead of after Monaco. The decision adjusts the ADUO (Additional Development and Upgrade Opportunities) system in response to the cancelled early-season races and aims to provide struggling engine makers a quicker development path.

Why it matters:

The timing of this first assessment is crucial for maintaining competitive balance. Bringing it forward gives teams like Ferrari, Red Bull, and the new Audi project a potential lifeline to close the performance gap to Mercedes sooner, which could impact the development race and mid-season competitive order. For Mercedes, it presents a challenge to maintain its current power unit advantage under increased pressure.

The details:

• The ADUO system allows engine suppliers who are more than 2% behind the grid's benchmark engine at designated assessment points to implement performance upgrades.
• The original 2025 schedule, which included the cancelled Bahrain and Saudi Arabian Grands Prix, would have seen the first assessment after the Miami GP.
• With those races cancelled, the first window was pushed back to after the Monaco Grand Prix in early June.
• The new agreement sets the first evaluation point after the Canadian Grand Prix on June 8th, which occurs before the Monaco race, effectively moving it up by one event.
• Manufacturer Standings: Mercedes is currently considered the benchmark. Honda (powering Red Bull) is seen as a near-certainty to qualify for upgrades. It remains to be measured if Ferrari and Audi are beyond the 2% deficit threshold to be permitted changes.

What's next:

The FIA is expected to provide final confirmation on the ADUO implementation timeline next week. All eyes will then turn to the post-Canada analysis to see which manufacturers officially trigger the upgrade allowance and how quickly they can bring new components to track. This earlier window could accelerate the in-season engine development war, with implications for the championship fight as early as the European summer races.