Some engines use a spark to ignite their fuel, and others rely on compression. What does all of that mean? And how do the two ...

We recently covered how Nissan scored an acknowledgment from J.D. Power in the 2025 US Initial Quality Survey, with the maker ...

Imagine a 100GB movie in a text! Anthony Ravenberg's quantum compression shatters limits, offering extreme data reduction and quantum-resistant security.

Calculating Compression Ratio. Calculating the displacement is the easy part. All you need to know for that is bore and stroke. To understand the compression ratio, you also need to take into ...

A gasoline piston engine that can dynamically change its compression ratio —that is, the amount by which the piston squeezes the fuel-air mixture in the cylinder—has long been a holy grail of ...

If you overbore our sample 350 from 4.00 inches to 4.020 inches and make no other changes, the compression ratio will increase from 8.84:1 to 8.90:1 because the volume of the cylinder has increased.

To get the compression ratio, simply divide the total volume above the piston at BDC by the total clearance volume at TDC. See All 9 Photos. Get Real, Dulcich.

The Skyactiv-X engine has been designed to have a very high compression ratio—16:1 in fact—and to use a very lean air:fuel ratio, but both of these are just below the threshold needed for HCCI ...

Although details are thin on the ground right now, Infiniti says that the VC-T engine can alter its compression ratio from as low as 8:1 (for high performance) to as high as 14:1 (for efficiency).

By varying the compression ratio – in this case by putting the small-end bearing into an eccentric adjuster, automatically tilted by oil-pressure-activated rods either side of the con-rod ...

With all of our compression-ratio calculations behind us, we ran the two on the dyno. First up was the high-compression combination. The 4.6 GT motor was equipped with the TEA-ported PI heads, ...