This coach that the OP is considering is similar to my 2000 MODEL# 38WDS Endeavor. Loaded for travel with full tanks, weight is about 26,000 lbs. The Model 37WDS should be a little lighter. At 275 hp, this coach will meet the 1 hp per every 100 lbs. What I think it will be a little shy on will be torque. My Cat 330hp has 860 torque and I think the smaller Cummins is lower than that.
Overall, if it checks out it will be a good usable motorhome if you don't want to win drag races. And remember, a DP does not accelerate, it just gains momentum. :)
Fred