I have zero experience with motorhomes. I have never driven one. So as a result I have no idea what your 0 to 60 times are or how fast you go in the 1/4 mile.

But I do know speeds in our buses is based on our senses. If you sit up high, and you cannot hear the engine it is probable you will grossly underestimate speed or acceleration. We all judge our speeds and acceleration by how fast the road slides beneath us and if we are sitting high the sensation of speed is diminished because of the distance we sit above the road. Likewise not hearing the engine also hides the fact our engine is really pulling us along.

But mechanically our buses are also not set up for acceleration but for economy if you want to call pushing 50,000 plus pounds down the highway an economy consideration. If you redo the test drive, but put the transmission into the non-default mode you will notice it hangs in gear longer and snaps off the shifts authoritatively rather than upshifting at 1400 or 1500. I don't know if the transmission pad is like mine on the newer coaches, but by pressing the mode button on mine I go into performance mode and will be able to raise the shift points to as much as 2100 significantly reducing the time to 60 or the 1/4 mile.

But since our buses are so great we drive slow to maximize the time we spend enjoying them.