The 2015 Ram 3500 is the big dog in the number Ram trucks. It is the heavy-duty truck that is still made to be used for personal use. Granted that personal use should involve some heavy hauling that can’t be had by the 1500 or the 2500. The 3500 has leading in class hauling and towing. This is one hard-working truck. The engine choices for the 3500 are a 5.7 HEMI V8 with 383 horsepower, a 6.4L Hemi V8 with 410 horsepower, and a 6.7L Cummins Turbo Diesel. This last engine is where the true power of the 3500 lies, with 385 horsepower and a max tow rating of 30,000.