Mercedes Defended Over F1 Power Unit Legality Concerns
Former Formula 1 driver Juan Pablo Montoya has publicly defended Mercedes after rival teams questioned its power unit. He said the team acted within the written rules. Montoya made his remarks to Filmogaz.com.
Regulatory background
The 2026 power unit regulations require a compression ratio of 16:1. Current FIA grand prix tests measure that ratio at ambient temperature.
Mercedes’ Brackley-based engine is reported to meet the ambient checks. Observers believe the same power unit can run at 18:1 on track.
Technical implications
An 18:1 compression ratio would improve thermal efficiency. That offers gains in low- and medium-speed corners for the W17 car.
If true, the difference could provide a measurable on-track advantage. Rivals say such operation raises legality concerns.
FIA response and new testing
The FIA has so far judged the engine legal under existing tests. It has announced new power unit checks that start on June 1.
From that date, the FIA will measure compression ratios at 130°C. Testing at that temperature would reveal an 18:1 setting, removing any potential edge.
What the changes will force
Teams will need to ensure their units physically meet a 16:1 ratio under the new hot measurement. The update closes a testing loophole tied to ambient checks.
Montoya’s defence
Montoya argued rivals were wrong to complain. He described the situation as an example of engineering creativity in F1.
He said teams should pursue similar technical solutions instead of lodging protests. Montoya stressed that finding clever interpretations is central to the sport.
- Compression ratio required by rules: 16:1
- Alleged on-track compression ratio: 18:1
- New FIA test temperature: 130°C
- New tests effective from: June 1
Montoya’s defence has focused attention on innovation and compliance. The debate highlights ongoing tension between technical ingenuity and regulatory clarity in F1 power unit development.
