While the F1 regulations will change in 2026, Mercedes has already found a loophole in them. So much so that the other teams fear the worst and hope that the FIA will quickly clarify things.
In 2026, Formula 1 will change era for better and for worse with the implementation of new technical regulations. And, as could be expected, the teams will rack their brains very hard to build the fastest single-seater possible… even if it means carefully examining the new rules to find flaws. However, according to several media, Mercedes has already found one linked to the engine, and more precisely to the authorized compression ratio.
“No cylinder in the engine may have a geometric compression ratio greater than 16.0. The procedure for measuring this value will be detailed by each manufacturer (…) and carried out at room temperature”, can we read in the new regulations (article C5.4.3). For its part, the German team would have found a way to reach a rate higher than 18 when the car is on the track, i.e. when it will not be controlled at that time.
Mercedes already in the sights of several teams
Obviously, this rumor quickly spread and many engine manufacturers and teams have already expressed their dissatisfaction to the International Automobile Federation (FIA) which will have to quickly rule on the subject. Because this difference in compression ratio could allow Mercedes to have “an additional 15 horsepower to the thermal engine, or roughly three tenths per revolution”according to The Team. On this subject, Red Bull is keeping a low profile for the moment because the team has also spotted this flaw.
The 2025 season has barely ended when a first controversy linked to the new regulations has emerged. This should not be the last because everyone will try to make the most of the new rules. The different single-seaters will therefore undoubtedly be closely scrutinized during the pre-season tests in Bahrain during February (from the 13th to the 15th then from the 20th to the 22nd). Before a first on-track fight scheduled for early March in Melbourne (Australia), others behind the scenes should take place before then. Be careful, it might rub…
