F1 and power unit manufacturers to vote on extra engine tests

Formula 1's five power unit manufacturers are set to vote on a proposed tweak to how engine compression ratios are measured, which could come into force over the summer break.
The 2026 power unit regulations prescribe an engine compression ratio of 16:1, down from 18:1 last year. That compression ratio has always been measured at ambient temperature when the engine isn't running, so it doesn't ...Keep reading