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

F1’s 2026 rules set a 16:1 compression ratio limit for engine cylinders. This caps how much the engine can squeeze fuel ...

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 ...

Lewis Hamilton addressed rumors of a Mercedes compression ratio advantage after Day 1 of Bahrain testing, calling for a level ...

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

With every passing day the Mule provides opportunities beyond our original expectations. Since the 467ci engine belongs to HPP editor Tom DeMauro, it is at our beck and call. This affords HPP the ...

There is a dispute between F1s teams over a rule limiting the compression ratio in the new power units for 2026; watch the ...

An engine loophole in the 2026 regulations has been the subject of recent meetings ...

You've probably heard racers talking about leakdown testing as a method of verifying engine condition. Being a hot rodder, you've probably performed a similar function by using a compression tester to ...

Increasing an engine’s compression ratio is a proven way of unlocking extra horsepower, but there’s a point of diminishing returns. The team at Garage 54, the Russian mechanics who built a V16 using ...

Gasoline engines operate on the Otto cycle, relying on standard four- or two-stroke combustion. What is the Atkinson cycle, ...