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Old 01-06-2017, 11:33 AM   #15
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If you're expecting BMW like performance from any motorhome, you are going to be sadly disappointed. You will slow down on hills no matter what you buy, you're retired, you have time. More HP is always better, but I would worry more about getting the floorplan that works best for your lifestyle.
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Old 01-06-2017, 11:37 AM   #16
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Quote:
Originally Posted by SHO Continen View Post
That's what I get in my shorty 22' gasser. What a cruel world!
You may be a little closer to reality, however and the only way to really know is for having an electronic device on board that calculates it for you. This is for the life of the coach up to that point and includes all terrain, idling, traffic stops, gear shifting, startups.....etc.
This business of using pencil and paper with a few fill ups, while going down a level interstate, just won't get it.
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Old 01-06-2017, 11:46 AM   #17
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Originally Posted by Kiawah View Post
If you're expecting BMW like performance from any motorhome, you are going to be sadly disappointed. You will slow down on hills no matter what you buy, you're retired, you have time. More HP is always better, but I would worry more about getting the floorplan that works best for your lifestyle.
There's been a lot said about getting the right floor plan and like nothing else matters for some, but this should go without saying, for the most part and there's no reason why one can't have the best of all worlds.
I feel that we got everything we wanted, within our budget and from the ground up, without compromise.
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Old 01-06-2017, 12:04 PM   #18
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I don't worry about mileage, I try to maximize it by driving "smart" but if mileage was a concern I would not have bought a DP.
Worry or not as some do (I don't), more mpg, which just equates into saving on money, is one of the most easily attained things with RV ownership and accomplished by staying at Walmart or other, for the night.
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Old 01-06-2017, 12:13 PM   #19
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tropical36
I have a 250hp 3126 Cat engine in a 35' Safari coach...(that's only 7.14 hp per foot).
Although I can't get to the top of the mountain as fast as a more powerful coach...that 250hp always gets my coach, (and my 3,000# toad), there.
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Well certainly it does. Just saying that if you had 10HP per foot or 350hp, it would get up there, just as quick as the big boy 45ft. jobs, with 450hp.
Having said that, it's not like you're climbing mountains each and every day of travel, either.
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Old 01-06-2017, 12:19 PM   #20
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Originally Posted by SHO Continen View Post
That's what I get in my shorty 22' gasser. What a cruel world!
I have a feeling I'd get less if I was loaded to the max GCVWR of 69,000#'s though!
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Old 01-06-2017, 06:25 PM   #21
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Don't forget to factor in altitude. Pulling a little hill on the East Cost or the South is not the same as pulling a hill at the same grade for many miles at 11,000'. My 500HP cummins only puts 367HP at 50 MPH to the ground. (measured on the dyno) Pulling the Colorado passes I drive often, I figure I am down to around 300 or so unless I am at full boost from the turbo, in which case it could be argued that I am still at 367. Engine heat and tranny heat management are also impacted in thin air. I have yet to drive over Berhoud Pass and think, "I wish I had a smaller motor, I just got up here too fast." ...For that matter, on the downhill side, I have never thought, "I wish this engine brake was not as strong."
I will agree that the difference CAN be measured in minutes or maybe seconds. I measure it in blood pressure.
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Old 01-06-2017, 06:41 PM   #22
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Battle wagon,

You know there's a middle ground out there too. Currently new Newmar Mountain Aires are powered by 500hp with 1650 torque. I can tell you the torque is the bigger value to think about. I drive a Aerial Fire truck with this exact motor/tranny and it works outstanding and weighs 60k lbs. now we don't try and climb the mountains out here but it will perfo m to your liking. The Mountain Aire is our target coach.
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Old 01-06-2017, 07:13 PM   #23
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I really appreciate every ones input! As I read your comments I do realize that mentally we are still running on east coast time and working like crazy so we can take the plunge. I'm sure we will adjust nicely to MH retirement living and learn how to relax!

My co-pilot would not like getting stuck behind a truck at 10mph so we'll have to learn to anticipate well.

We are not expecting sports car performance. At the same time, like many say, it never hurts to have the more HP. Ultimately, we will find the right mix. The 500HP engine may be a good choice.

I am curious to hear from anyone who has had both engines and to learn what difference it made for them. Thanks again. You all have been most kind!
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Old 01-06-2017, 07:55 PM   #24
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Big motor makes me happy! Doesn't matter which direction we choose to go, or what the wind is doing. Have had better economy motorhomes, but never been as happy as with this one with the big motor. My cheeks get to hurting after driving cuz I'm grinning from ear to ear as I drive.
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Old 01-06-2017, 07:56 PM   #25
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Since I have a meek and mild gasser, I guess I really can't comment on the performance differences between the 450 and 600 HP engines. However, I'd be willing to speculate the 600 HP engine equipped MH will cost you anywhere from $250 to $700 THOUSANDS more to purchase than the 450 HP engine MH!
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Old 01-06-2017, 08:23 PM   #26
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Well I even wanted 400hp or more for a car (at home a S6) so of course I preferred a 600hp coach. It helps in acceleration for merging etc. We have not been in mountains yet and just did about 1200 miles towing for the first time getting about 6mpg. The extra hp helps in driving in more places than the mountains. Having a little extra umph is just nice to have.

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Old 01-06-2017, 08:26 PM   #27
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Originally Posted by Rockwood27 View Post
Since I have a meek and mild gasser, I guess I really can't comment on the performance differences between the 450 and 600 HP engines. However, I'd be willing to speculate the 600 HP engine equipped MH will cost you anywhere from $250 to $700 THOUSANDS more to purchase than the 450 HP engine MH!
In my case it was under $50k for the bigger engine.

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Old 01-06-2017, 08:27 PM   #28
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I have not seen any comments concerning merging onto interstates. Or passing on 2 lane roads. Both are important I have 450HP now and am looking for a new MH. Number one will be interior layout and number 2 will be 600HP. I have driven a 600HP unit and size does make a big difference.

I am a horsepower junkie. Can I get a 750HP motorhome?
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