At TopSpeed, William Clavey is Editor-at-Large, where he focuses on authority and exclusive content, reviews, news articles, features, and opinion pieces all while sharing his passion for everything ...

Millions of drivers are paying extra for premium gas and getting absolutely nothing back.

Mazda has officially announced the Skyactiv-Z, an all-new gasoline engine set to debut in the next-generation Mazda CX-5, expected in late 2027. The engine will be paired with a hybrid system, and ...

A fundamental difference between gasoline and diesel engines is that a gasoline engine uses spark ignition while a diesel engine uses compression ignition. Before we delve deeper, let's understand how ...

If you've even casually contemplated purchasing a Ram truck powered by a diesel engine in the last couple of decades, the name Cummins is undoubtedly familiar to you. The Indiana-based company has, ...

Gasoline and diesel engines are very different. The former rely on spark ignition while the latter use compression ignition. Diesel engines typically run at much higher compression ratios than ...

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 ...

Gas versus diesel is a debate over which billions have been spent to see which is better. Famously, Soviet tanks in World War II were powered by diesel, while the Germans used gas engines. Closer to ...

Chevrolet vehicles can be hit-or-miss with their design problems. This has led to a number of models sporting problematic ...

Watch this miniature 4-stroke OHV gasoline engine from Stirlingkit transformed into a fully working generator. A fascinating ...