Jeep’s 4.0-liter straight-six engine is iconic. Much like the Ford 300, it’s a down-and-dirty truck engine that stayed in production for decades. Also like the Ford 300, it can make a ton of power ...

The 4.0-liter straight-six made famous for its use in Jeeps in the Eighties and Nineties is known for many things, but power isn't one of them. It's a workhorse motor, meant to take abuse and run ...

Jeep, as the brand we know today, was first established by Willys Overland after it produced the company's Quad vehicle for the U.S. Army during World War II. In the years since, Jeep has passed into ...