While most engines have the same number of spark plugs and cylinders, some four-cylinder blocks have two plugs for each ...

Four-cylinder engines have been part of the automotive scene for over a century. Yet the quest for more power under the hood dominated most of the 20th century, giving rise to six- and eight-cylinder ...

While not usually as ear-pleasing as the conventional V12 engine or as commanding as the twin-turbocharged V8 engines we've seen in some of Hennessey's Venom F5 models, the humble four-cylinder has ...