Every car engine has quite a few details, ranging from cylinder count to compression ratios. How does changing the compression ratio affect the engine?

What makes a diesel engine different to a regular gas engine, and is one better than the other?

Audi CEO Gernot Döllner says combustion engine platforms will continue evolving as markets move toward electrification at different speeds. The brand may delay a full EV transition while refining ...

In an internal combustion engine, air and fuel are injected into the cylinders, where ignitions occur in a controlled environment. The combustion cycles force pistons to move, and that movement is ...

Almost all gasoline engines, whether they're efficient-yet-less-refined four-cylinders, high-horsepower V6s, or growly and torque-rich V8s, use much the same process to create power. The "Otto cycle" ...

CEO Gernot Döllner told Car and Driver that faltering EV sales and strong interest in gas are leading Audi to be more ...

Despite its critics and moves toward electrification, the internal combustion engine is not yet dead. Though its design for passenger vehicles may have begun to reach its apex with Mazda’s Skyactiv ...

Westport Fuel Systems said its H2 HDPI fuel system burns hydrogen in a modified internal combustion engine with almost no carbon emissions and performance superior to that of the base diesel engine.

As the season-opener Australian Grand Prix gets underway on Sunday, here's a look at some of the most sweeping rule changes ...

The introduction of RON 95 alongside E20 is intended to stabilise combustion as ethanol content rises. RON, or Research Octane Number, measures a fuel’s resistance to knocking. Higher octane fuel ...