Yes and no. Depends on so many variables like road conditions and manufacturing quality and parts tolerances. A lot of it you can find and fix with a little ingenuity. Not much you can do about bad roads except avoid them.
Our Navion started out with some rattles when we drove it on some terrible concrete roads. We'll find them and fix them as we figure out the rest of the rig.
Our little MB 3L diesel pulls very well for a small engine. I was surprised at how well it works in a 5 ton vehicle.