Red Bull Ford Powertrains has pushed the FIA to re‑examine its first‑round ADUO (Additional Development and Upgrade Opportunities) rankings after the Monaco Grand Prix, citing concerns over the methodology used to assess power‑unit performance.
Red Bull’s Challenge Intensifies the Verification Window
All four Formula 1 constructors received preliminary ADUO scores over the weekend, with the data released by the FIA placing the newcomer at the top of the list. The clearing house for the information, however, now faces a demand for deeper data scrutiny from Red Bull, which argues that the measurement system is flawed and that no single data sample shows the team ahead of Mercedes.
Laurent Mekies, Red Bull’s team boss, stated that the engine‑development group is not opposed to the ADUO programme as a whole; it merely wants the FIA to revisit the sensor logs, metric definitions and analytical approach before any definitive conclusions are drawn.
Originally, the dossier review was expected to finish within seven to ten days, coinciding with the lead‑up to the Barcelona Grand Prix, but the verification process has pushed the clock ahead of schedule.
Current State of the ADUO Rankings
In the interim, the results already circulating among paddock insiders confirm Red Bull at the top, which precludes any upgrade launches under the ADUO regime for the current season. Mercedes, meanwhile, sits in the 2‑4 % Ice‑deficit bracket, earning it a single upgrade token.
Ferrari, Audi and Honda fall within the 4 %–10 % deficit range, awarding them two tokens for 2025 and two more for 2026. The FIA has affirmed these standings, but the final confirmation will only come after the red‑team’s verification, possibly as late as the post‑Silverstone briefing.
Upgrade Roll‑Outs Before the Official Declaration
Despite the missing public announcement, manufacturers have already begun installing fresh power‑unit components. Audi deployed an updated engine at Barcelona, and Ferrari unveiled its first ADUO upgrade at Austria, with an updated turbo slated for post‑summer release.
Honda followed suit, revealing at Spielberg that a thrust‑boost upgrade is planned for the F1 summer break. All three teams already possess the FIA’s tacit green light, as the verification merely concerns formal confirmation rather than operational permission.
Systemic Gaps Fueling Paddock Friction
The ADUO framework, though intended to support teams trailing the 5 % performance threshold, suffers from the mismatch between its ICE‑centric metric and the broader upgrade allowances that extend to the electrical side of the power unit. Ferrari’s smaller turbo, which the system does not consider, is cited by teams as an example of the limited scope.
While the FIA’s regulator Nikolas Tombazis recalled openness to a more intricate balance of parameters, the consensus at the 2025 spring meeting was to keep the system straightforward. This has left Red Bull conflicted: a doubt that Mercedes’ audit result might be overturned could leave Red Bull in the lead for future IS‑E capability checks, maintaining its hierarchy unless rivals choose not to utilise their tokens.
Implications for Mid‑Season Development
Mercedes’ request for a thorough re‑assessment could potentially postpone all ADUO‑related enhancements for the team. Any deferral could preserve Red Bull’s current ranking in future evaluation windows, further entrenching the power‑unit hierarchy over the course of the championship.
With the FIA expected to issue a formal press release soon, the racing community will monitor the final outcome. The current momentum suggests that the original ADUO format may require revisiting, as the tension between the governing body and the teams continues to deepen.
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