Hamilton 'disappointed' if Mercedes edge linked to compression ratio

Lewis Hamilton didn’t hold back after qualifying seventh at the Australian Grand Prix, expressing bewilderment and frustration at... The post Hamilton 'disappointed' if Mercedes edge linked to compression ratio appeared first on F1i.com.

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<p>Lewis Hamilton didn’t hold back after qualifying seventh at the Australian Grand Prix, expressing bewilderment and frustration at...</p> <p>The post <a href="https://f1i.com/news/560432-hamilton-disappointed-if-mercedes-edge-linked-to-compression-ratio.html">Hamilton 'disappointed' if Mercedes edge linked to compression ratio</a> appeared first on <a href="https://f1i.com">F1i.com</a>.</p>

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Related Regulations

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technical Regulations

Art. C5.4.3

sporting Regulations

Art. B2.4.1

Hover over badges for quick summaries, or scroll down for full official text and simplified explanations.

Full Regulation Text

Technical Regulations

Article C5.4.3

FIA Source

Geometric compression ratio limit

Chapter: C5

In Simple Terms

F1 engines have a limit on how much they can compress the air-fuel mixture inside each cylinder. No cylinder is allowed to have a compression ratio higher than 16.0, which means the mixture can be squeezed to no more than 16 times its original volume. Manufacturers measure this themselves following FIA guidelines.

Maximum compression ratio of 16.0 applies to every cylinder in the engine
Compression ratio measures how much the air-fuel mixture is squeezed before ignition
Each engine manufacturer is responsible for measuring and verifying their own compression ratio
Measurements must follow FIA-provided guidance to ensure standardization

Official FIA Text

No cylinder of the engine may have a geometric compression ratio higher than 16.0. The procedure to measure this value will be detailed by each PU Manufacturer according to FIA guidance.

compression ratioengine regulationscylindergeometric compressionengine limit

2026 Season Regulations

Sporting Regulations

Article B2.4.1

FIA Source

Race Qualifying Session

Chapter: B2

In Simple Terms

Qualifying is the session where drivers compete to determine their starting positions for the race. It normally happens on the second day of a Grand Prix weekend, either 2-3 hours after the final practice session (FP3) or 3-4 hours after the Sprint race, depending on the event format.

Qualifying determines the race grid order - your position in qualifying decides where you start the race
Standard format: held on day two, 2-3 hours after FP3 (free practice 3)
Alternative format: held on day two, 3-4 hours after Sprint race
Timing varies based on whether the weekend includes a Sprint race or follows the traditional format