When people think of big engines, they usually think of regular gas engines, like Koenigsegg's 2,300-horsepower monster. However, if you think about it, there are many much bigger vehicles out there, ...

Americans are no strangers to big engines. The biggest engine ever fitted to a production car – Cadillac's 500-cubic-inch V8 — hails from the U.S., and bigger engines still would likely have followed ...