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FIA to Review ADUO Ranking as Red Bull Challenges Results
Highlights
- FIA will review ADUO rankings after Red Bull’s concerns.
- Red Bull’s combustion engine rated top benchmark by FIA.
- Mercedes allowed upgrades; Red Bull barred from any this year.
- Review includes power sensor data from first five races.
- Further ADUO evaluations planned post-Hungarian and Mexican Grands Prix.
The FIA will review its ADUO rankings after Red Bull questioned why its combustion engine is rated Formula 1’s benchmark.
Teams received the initial summary on Monaco Grand Prix race day, covering performances from the first five events of 2026.
The dataset indicates Red Bull’s internal combustion engine leads the field, making the team ineligible for any ADUO catch‑up upgrades this season.
That status jars with results. Mercedes has won every race, yet FIA numbers place it over 2% behind Red Bull, unlocking one 2026 upgrade and another in 2027.
FIA rates Red Bull’s ICE as the benchmark, barring upgrades under ADUO in 2026.
Mercedes also receives a $3 million cost‑cap allowance and extra test‑bench hours. Ferrari and others are assessed over 4% adrift, granting two 2026 upgrades and two more next season.
Red Bull has not commented publicly. Internally, it is surprised, as team models suggested it trailed Mercedes on ICE performance despite race‑day outcomes skewing perception.
Earlier this year, Laurent Mekies estimated a deficit of about three tenths to Mercedes’s power unit, calling Mercedes ‘a long way ahead’ of most rivals.
Red Bull has leaned on the catch‑up mechanism to close that margin. Benchmark status blocks all 2026 upgrades and could constrain 2027 if rivals strategically delay developments.
Mercedes is classified over 2% behind, unlocking one 2026 upgrade plus $3m cap space and extra bench hours.
Seeking clarity, Red Bull asked the FIA to explain the methodology. After discussions, the governing body agreed to recheck the opening‑phase dataset to confirm its conclusions.
The review will interrogate power‑sensor outputs fitted to all cars, which the FIA uses to verify ICE performance across the season.
FIA will recheck power‑sensor data from the first five races; no change to standings is guaranteed.
The FIA stresses reassessment does not guarantee changes. Further ADUO checks are planned after the Hungarian and Mexican Grands Prix.
The process follows a contentious ADUO ruling that set competitive baselines for 2026, while broader F1 rule changes shape development trade‑offs and cost control.
Analysis of the Formula 1 catch‑up system’s implications for Red Bull’s benchmark status continues as teams calibrate strategies for 2026 and 2027.
Visual Summary
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Red Bull
Benchmark
Engine
Red Bull
Benchmark
Engine
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Benchmark Shock: Red Bull named #1 engine
Surprising the paddock and even Red Bull themselves—no ADUO upgrades allowed!
Surprising the paddock and even Red Bull themselves—no ADUO upgrades allowed!
Red Bull
Benchmark
Mercedes
?
Can Upgrade
+1 upgrade & $3M
Ferrari
⚡️
2 Upgrades
2026 & 2027
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Teams stunned: Even Red Bull expected Mercedes to be ahead.
Red Bull now locked out of upgrades
for the rest of the year!
Teams stunned: Even Red Bull expected Mercedes to be ahead.
Red Bull now locked out of upgrades
for the rest of the year!
FIA
Under Review
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FIA re-examining engine data after Red Bull challenge.
No guarantee of change — decision under scrutiny.
No guarantee of change — decision under scrutiny.
Fair play at stake.
Next reviews: After Hungarian & Mexican GPs.
Will this surprise shake up F1’s catch-up game?
Next reviews: After Hungarian & Mexican GPs.
Will this surprise shake up F1’s catch-up game?
James William covers the IMSA WeatherTech SportsCar Championship, from the Rolex 24 at Daytona to sprint-race formats. His reports include prototype performance reviews, GT class battles, and pit-stop strategy insights for endurance-racing fans.
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