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, ...

What's the biggest engine you can think of off the top of your head? There are certainly still some colossal motors in the automotive market, as big as Bugatti's 8-liter W16. If you're thinking ...