Bigger is not always better, and this is true for large heavy-duty pickup trucks. These monster trucks are the supercars of the truck world and have more power than drivers are likely ever to need, while presenting day-to-day challenges that go beyond lower fuel economy. One example is Ford’s 6.7-liter Power Stroke diesel V-8 with 400 horsepower and 800 pound-feet of torque. The base engine in a Peterbilt 348 dump truck offers a mere 260 horsepower and 660 pound feet.