The compression ratio battle is reaching crunch time.

The compression ratio controversy will be addressed with a new test, but not until August.

A political firestorm has been brewing in Formula 1 in recent weeks and months over whether engine manufacturers have found a loophole in the new 2026 technical regulations.

Mercedes could come out on the losing side of a critical vote regarding the engine regulations as other power manufacturers ...

The crux of the matter lies in that the Formula 1 compression ratio is not measured by sensors during engine operation, but statically. The FIA simply compares the ratio in volume in the cylinder ...

A single line in the technical regulations has sparked months of debate — here’s how the compression ratio saga unfolded and ...

The FIA has proposed a new approach to the way it tests for compression ratio limits, with Formula 1's power unit manufacturers to vote on whether to approve a mid-season change that could hamper ...

Toto Wolff has labelled as "utter bulls**t" that the ongoing compression ratio saga means the Mercedes power unit is illegal.

A late rule change could turn the 2026 season on its head.

Mercedes boss Toto Wolff has dismissed Formula 1’s escalating compression ratio controversy as “a storm in a teacup”.