The big difference between the Rangers and the Xpeditions is the rpm they operate at. These Xpeditions run mostly from 4500 to 6500 rpm. Anything over 15 mph and you are at 5000 rpm or higher. The Rangers would run mostly between 3500 and 5000 rpm. On my ADV I have put sound deadener insulation in the roof and behind the seats and use a thick horse stall rubber mat from Tractor Supply over the engine on top of the existing insulation. If I run at 15 mph or less the noise is manageable. When I exceed 15 mph the noise is terrible. The noise seems to be coming from the tunnel between the seats as best I can figure. I have resigned myself that the wife and I are going to need headsets so we can talk without yelling at each other. I really like this machine. It is smooth riding, comfortable, and just a joy to drive. Almost.