Mercedes AMG has cranked out a gem of an engine. The hand built M139 is a 2.0L turbocharged inline four-cylinder that makes 416 horsepower! That makes it the most powerful turbo four-cylinder engine ...

NASCAR Cup engines live in a strange space: they are tightly regulated, largely hand built, and expected to survive hours at full throttle while still making headline power. The rulebook caps ...

Considering the exterior, we’ve got to appreciate the effort Nelson Racing Engines put into cleaning and smoothing the engine block and cylinder heads. The whole engine looks like a show piece; all ...

A stock-based GM 4.3L V6 shocks the dyno with 1,400 horsepower at 33 PSI, proving this twin-turbo truck engine is far stronger than expected.