What this means is the engine can produce significant horsepower by using the low compression ratio with a turbocharger, or it can achieve excellent fuel economy by using a high compression ratio ...

Why variable compression ratio matters Today's gasoline-engine cars compress the outside air to about a tenth its original volume, a 10:1 ratio, inside each cylinder.

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 ...

GM has filed a patent application for a variable compression ratio engine, which can provide high power output when needed, and high efficiency when it's not.

Nissan varies the compression ratio between 8.0:1, a fairly low number—though typical for a turbocharged engine—and up to 14.0:1, very high for any engine, let alone one with boost.

Static compression is what engineers, engine builders, and even do-it-yourselfers dial in to an engine build. Basically, it's the exact compression ratio formulated into engine construction in a ...

Toyota Patent Suggests a High-Compression Diesel Truck Engine May Be in the Works With Toyota shifting away from V8s, this could be its answer for smaller displacement and high torque figures.

Pretty simple question actually (or so my ignorant mind thinks): At what compression ratio would an engine benefit from higher octane fuel? The Focus I drive is just over 10:1, and I've heard some ...