US EditionFormula 1: FIA to Revise Engine Rule at Centre of Row
The FIA and manufacturers agreed on transitional engine compression controls starting June 1, 2026, to address performance advantages from thermal expansion, with full operating-condition rules from 2027.
- On Feb 28, the FIA and manufacturers reached a compromise to resolve an engine controversy, with amendments approved unanimously by an e-vote of its World Motor Sport Council.
- Mercedes were suspected of exploiting thermal expansion to increase effective compression ratio, prompting protests after Melbourne amid rules limiting compression ratio to 16:1 measured cold.
- Controlling the compression ratio from 1 June 2026 requires hot and cold condition control, replacing the FIA's initial August 1 plan to measure at 130 degrees Celsius covering more than half the 24-race season.
- The changes affect multiple manufacturers and teams, with Mercedes supplying V6 engines to four of the 11 teams including McLaren, Williams and Alpine, and the FIA also approved sporting and financial regulation amendments.
- With 2026's major regulatory shift, the FIA says further energy management technical checks are ongoing, with collective learnings expected from pre-season testing and initial rounds.
24 Articles
24 Articles
The FIA has agreed with the manufacturers in the complicated Messcausa
The International Automobile Federation (FIA), the governing body of Formula 1, reported that the manufacturers of power units in the category unanimously approved changes in the way engine compression ratios are measured. One week after the start of the world championship in Australia, the measure responds to concerns raised by various sectors following pre-season training in Bahrain, but set a date for the start of implementation.
NiagaraFallsReview.ca
There’s been a change to F1’s engine rules and it could mostly impact Mercedes
LONDON (AP) — Formula One ’s governing body has reached a compromise with manufacturers that changes the way the compression ratio will be measured midway through this season and in the 2027 season.
The Independent
The Independent (US)F1 engine controversy finally resolved a week before new season
A compromise solution has been reached by the FIA to try and close a loophole in the new engine regulations
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