Rivals has requested clarification on a possible loophole in the 2026 regulations, and the entity admits to a technical discussion on the subject
Formula 1 2025 is barely over, but the 2026 season has already “started”, at least behind the scenes. Rumors indicated that Mercedes and Red Bull had found a loophole in the new engine regulations, leading Ferrari, Honda and Audi to seek clarification from the FIA.
Suspicion lies with the compression ratio of internal combustion engines, the maximum limit of which is 16:1 under the 2026 rules. However, the claim is that both teams would only fall within this value during static measurements, carried out with the engine off. In operation, as the temperature increases, thermal expansion of the components could increase the actual ratio to something close to 18:1.
If this scenario is confirmed, the estimated advantage would be around 15 horsepower, which could represent a gain of between 0.3 and 0.4 seconds per lap, especially on circuits more sensitive to power. The FIA has recognized that current measurements are carried out at room temperature with the engine off, admitting that thermal expansion can change internal dimensions. He nevertheless stressed that current regulations do not require controls under high temperature conditions.
In a statement, the entity said the topic had been discussed internally with powertrain manufacturers and that adjustments to regulations or measurement procedures could be adopted to ensure competitive equality.
So far no irregularities have been confirmed. Yet the FIA’s public stance and pressure from rivals indicate the discussion could open to new chapters as the 2026 season approaches.
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