Mercedes prepares engine contingency plan: A strategic retreat in the compression ratio war?. Mercedes could introduce a technical change to eliminate the advantage of their 2026 engine.

F1: Mercedes plans engine tweak to remove advantage

Mercedes could make a significant change to eliminate the advantage introduced by their engine, which has recently become the center of discussions across the Formula 1 paddock.

Confirmation is still pending, so for now, we can only rely on the rumors circulating in recent hours. Reports suggest that the FIA, following meetings with the various engine manufacturers on the grid, is considering introducing high-temperature checks regarding the highly debated compression ratio of the 2026 Power Units.

The goal is to finally resolve the controversy surrounding Mercedes and the potential protests from Ferrari, Audi, and Honda. The Brackley-based team, seen by many as the favorite for the upcoming season, is believed to have found a technical workaround that would allow them to use a different compression ratio at high temperatures, effectively bypassing the FIA checks conducted at ambient temperature.

Mercedes reacts after FIA engine ruling

If confirmed, this “trick” could give the Silver Arrows an extra ten horsepower compared to their rivals, translating into a potential advantage of around two-tenths of a second per lap. Meanwhile, Mercedes engineers, led by team principal Toto Wolff, are reportedly already considering possible countermeasures.

According to motorsport.com, Mercedes could opt to use a fuel with a lower calorific value than what their engine could handle. This adjustment would remove the advantage offered by the variable compression ratio, avoiding protests and controversy from other engine manufacturers.

Of course, this modification would only be implemented if the FIA decides to change its measurement procedures, as requested by Ferrari, Audi, and Honda. If the FIA does not alter the rules, Mercedes will likely continue using the current fuel while trying to maximize performance.

The possibility of Mercedes voluntarily reducing its power output shows just how seriously the team takes the threat of a formal protest from its rivals. As the 2026 season draws closer, the battle is shifting from who has the most innovative engine to who can best navigate the political landscape of the FIA.