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 ...

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 ...

Propulsion system designer Everllence’s first ammonia dual fuel engine has passed its factory acceptance test (FAT), paving ...

E15 fuel is becoming more common, but that doesn't mean it's right for your car. Here's what you need to know about E15 and ...

Gasoline prices remain high in North America amid mixed signals about talks to end the war in the Middle East, leading to ...

As two of America's traditional 'big three' automakers, Ford and GM have a rivalry steeped in history. They've each offered similar types of products that fulfill the same purpose for buyers, be they ...

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, ...

Cummins engines have long been synonymous with diesel power, but for the first time in its 100-year history, the company has introduced a gasoline-powered engine. The B6.7 Octane is the company's ...

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 ...