The General Motors LT1 engines might be long-running, but the mills it has adorned are quite different. So which LT1 is which, and what are the differences?

At first glance, the concept of engine compression is simple enough:It's the ratio of the volume of the combustion chamber and bore when thepiston is at bottom dead center (BDC) versus when it is at ...

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 ...

From the archives: Using a stash of parts and an old set of AFR 227 heads, see how this small-block combo got every last bit of power. To celebrate HOT ROD's 75th anniversary, we teamed up with ...

A computer generated power stroke of an internal combustion engine, following ignition - Pathompong Thongsan/Getty Images When comparing engine specs for nearly any combustion engine automobile, we ...

As you may know, an engine's compression ratio is directly linked to its combustion efficiency. All else being equal, higher-compression engines tend to make more power while offering better fuel ...

Small-block V8 engines may not be as brawny or powerful as their big-block counterparts, but they completely revolutionized the car industry. However, since the V8 became a staple American power mill, ...

Apart from the very curious, not many people ask why diesel engines, compared to gasoline, run higher compression ratios. The argument is reasonably straightforward and starts with fuel ...