Red Bull's ADUO Challenge Leaves FIA Engine Rankings in Limbo

Red Bull-Ford Powertrains has forced the FIA into an additional verification of the first ADUO rankings after initial data placed the newcomer atop the ICE performance chart. The check has dragged past its expected timeline, leaving official results in limbo even as Ferrari, Audi and Honda begin introducing upgrades.

Why it matters:

The ADUO system was designed to help struggling engine manufacturers close the gap, but it has become a political flashpoint. Red Bull is challenging Mercedes' entitlement to a single upgrade token, insisting no data shows them holding an ICE advantage. If the initial findings stand, Red Bull remains frozen out of development while three rivals enjoy multiple upgrade windows into 2027.

The details:

• The Rankings: Initial results through Canada placed Red Bull-Ford first. Mercedes sits 2-4% back, earning one token. Ferrari, Audi and Honda are beyond 4% behind, qualifying each for two upgrades this season and two in 2027.
• The Challenge: Laurent Mekies argues there is "not one single data sample" showing Red Bull ahead of Mercedes, prompting extra verification before the Spanish GP.
• Already Deploying: Audi ran updates in Barcelona, Ferrari introduced its first upgrade in Austria, and Honda plans developments for after the summer break.
• System Gap: The FIA only measures ICE output, but permitted upgrades extend to electrical components. Factors like turbo size were excluded to keep the system simple.

What's next:

The FIA aims to publish confirmed rankings before the post-Silverstone meeting, though delays could push confirmation later. The dispute has intensified calls to rethink whether the framework truly serves its purpose. With upgrades already on track, the episode highlights how engine parity remains one of Formula 1's most contentious political battlegrounds.