Mercedes' Formula 1 Power Unit (PU) has been the subject of controversy in recent weeks, with the team facing criticism from its rivals for exploiting a loophole in the new rules. The compression ratio, which is limited to 16:1, has been a point of contention, with Mercedes claiming to be within the bounds of the regulations. However, its competitors have been vocal in their opposition, and the FIA has been working to find a solution. A recent statement from the FIA announced that a new method has been developed to measure the compression ratio when the engine is hot, which will be implemented from the Dutch Grand Prix on August 23 onwards. This means that Mercedes will have to change its approach in order to meet the new requirements. The compression ratio loophole was first discovered by Mercedes, which found that the team could achieve a 18:1 ratio when the ...
Mercedes’ Formula 1 Power Unit (PU) has been the subject of controversy in recent weeks, with the team facing criticism from its rivals for exploiting a loophole in the new rules. The compression ratio, which is limited to 16:1, has been a point of contention, with Mercedes claiming to be within the bounds of the regulations. However, its competitors have been vocal in their opposition, and the FIA has been working to find a solution.
A recent statement from the FIA announced that a new method has been developed to measure the compression ratio when the engine is hot, which will be implemented from the Dutch Grand Prix on August 23 onwards. This means that Mercedes will have to change its approach in order to meet the new requirements.
The compression ratio loophole was first discovered by Mercedes, which found that the team could achieve a 18:1 ratio when the PU was running hot on track, while still complying with the letter of the law. However, its rivals have been united in their opposition, and a proposal has been submitted to implement a new test from August 1st, which will require compliance with the compression ratio limit at both ambient and operating temperatures.
The power unit manufacturers will now vote on the proposal, and it is likely that agreement will be reached. Mercedes has dismissed the complaints of rivals, suggesting that any performance gain is minimal, but Red Bull Racing boss Laurent Mekies has made it clear that others do not see it that way.
The proposed change is not unusual for the F1 world, but it is rare for the power unit manufacturers. Mercedes will have to make significant changes to its approach in order to meet the new requirements, but it is likely that the team will be given time to adapt.
The FIA’s proposal is a clear indication that the governing body is taking steps to address the concerns of its competitors. The new test will provide clarity on what can and cannot be done, and will help to prevent any competitive advantages from being gained through loopholes.
As the 2026 season progresses, it will be interesting to see how Mercedes and its rivals adapt to the new regulations. The proposed change is a significant step towards ensuring fair competition in Formula 1, and will help to maintain the integrity of the sport.
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