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 ...

Mazda’s powertrain team has brewed up a fancy new engine that, like a diesel, uses compression to activate the combustion process. In a press release on the new tech, Mazda tells us just how ...

A Reactivity Controlled Compression Ignition engine can achieve 60 percent thermal efficiency. That's incredible.

Most pickup trucks sold today have internal combustion engines. Passenger vehicles are powered by two main types of engines: compression, aka diesel, and spark ignition, aka gasoline. Besides the ...

A homogeneous charge compression ignition (HCCI) gasoline engine has been something of a holy grail for internal combustion engineers for decades, promising the fuel economy of diesel engines but ...

Compression ignition is how diesel engines run. A diesel sprays fuel and highly compressed hot air into the combustion chamber to induce an explosion, rather than igniting the fuel-air mixture ...

Hyundai, Delphi, and the University of Wisconsin are co-developing a diesel-style engine that burns gas. Read more at Car and Driver.

Unlike spark-ignition gas engines or compression-ignition diesel engines that have a combustion process characterized by growth of a flame front from a single point in the combustion chamber, HCCI ...

Diesel engines have pistons that look different from the ones you'd see with a gas engine. There's a reason why that's the case, and it's all about performance.

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 kinds of engines differ?