P1racenews AI automatic summary:
A mid-season rule change is set to remove a suspected loophole Mercedes has benefitted from, but will it change F1’s pecking order?
A mid-season Formula 1 rule change is set to be implemented ahead of the Monaco Grand Prix that will ban an alleged loophole Mercedes is suspected to be taking advantage of. Following a technical row over engine performance that dominated the build-up to the 2026 F1 season, the FIA announced changes to the compression ratio measurement, effective from 1 June, with Monaco being the first race under the revised rules stemming from Mercedes’ controversy. Mercedes was accused of exploiting a loophole through the compression ratio regulations, which rivals believe gave them an edge. The row erupted due to suspicions that Mercedes had found a way to limit compression ratio loss, prompting rivals like Audi, Honda, and Ferrari to lobby for changes before the season start. The FIA confirmed the rule change would be implemented earlier than planned, introducing new tests at an ambient temperature of 130 degrees from 1st June. Though Mercedes remains dominant in the 2026 season, the rule change aims to level the playing field and address concerns over engine performance discrepancies.
