Roaring engines are standard fare at a stock car race. What’s the history behind the horsepower and what are the rules now? Read more here for the full story.

Before Hudson was folded into American Motors, it had developed its own eight-cylinder engine. Yet for years, it stuck with its old-fashioned straight-6.

NASCAR Hall of Famer Jeff Gordon just took his Corvette obsession to the next level—by literally building the heart of his ...