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01-29-2025, 06:04 AM
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#1
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Senior Member
Monaco Owners Club Coastal Campers
Join Date: Mar 2012
Posts: 2,250
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allegro bus questions
Hello guys
Long time Dynasty driver looking for the Allegro Bus with a 605 Hp motor. Is the 2018 and 2019 the same chassis?
If not what is the difference.
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2019 Allegro Bus 45 OPP
2001 Monaco Dynasty tag axle
2018 Jeep Grand Cherokee
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01-29-2025, 06:43 AM
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#2
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Senior Member
Tiffin Owners Club
Join Date: Sep 2012
Location: Columbus, NJ
Posts: 3,071
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I know that the 2019 is a Powerglide chassis. Just download a 2018 brochure to see what that is. Also, there is a much bigger difference between the 2 years, as 2019 was the first year for the full electronic package that is typical in most higher end coaches now. We love our 2019 Bus and the 450 hp is fine for us. The 605 is a real brute!
__________________
Larry & Cheryl Herman - Ranger, Henry, Georgie & Enzo (our Springers)
2019 Tiffin Allegro Bus 45OPP
2016 Ford Transit Connect on a Demco dolly
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01-29-2025, 06:49 AM
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#3
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Senior Member
Join Date: Mar 2024
Location: Bohemia NY
Posts: 2,625
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Anything with the 605 is not just an engine choice upgrade. Transmission and driveline also upsized. It is a very nice jump.
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Dennis
Bohemia NY
2008 Nimbus 342 SE Carlyle 
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01-29-2025, 07:49 AM
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#4
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Senior Member
Tiffin Owners Club
Join Date: Jun 2017
Location: Odessa, FL
Posts: 1,149
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605 takes up more room and storage options
And I believe it creates a step up in the back, if that is an issue. For me, I like the flat tile all the way through.
__________________
2023 Tiffin Allegro Bus 45OPP
2019 Birkshire 34QS - Traded
2020 Jeep Cherokee Trailhawk with BlueOx/AF1
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01-29-2025, 09:45 AM
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#5
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Senior Member
Tiffin Owners Club Freightliner Owners Club
Join Date: Apr 2012
Location: Southern NM
Posts: 3,840
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Both years are on the Powerglide chassis. As suggested go to the Tiffin Motorhomes , click on the owners tab, then owners hub, from there you can find all the information you need on the buses you’re looking at in the brochure section.
__________________
2018 Allegro Bus 37AP
2014 Phaeton 40 QBH (sold)
2022 Jeep JLURD
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02-05-2025, 06:22 PM
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#6
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Senior Member
Monaco Owners Club Coastal Campers
Join Date: Mar 2012
Posts: 2,250
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Quote:
Originally Posted by shepardmike
And I believe it creates a step up in the back, if that is an issue. For me, I like the flat tile all the way through.
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The 605 does have a step into the rear closet and a ledge under the clothes rod
But the tiffin brochure claims the 605 has 257CF of Basement storage and the 450 only 237CF
__________________
2019 Allegro Bus 45 OPP
2001 Monaco Dynasty tag axle
2018 Jeep Grand Cherokee
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02-05-2025, 06:28 PM
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#7
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Senior Member
Join Date: Mar 2024
Location: Bohemia NY
Posts: 2,625
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A consideration for the 605 is fuel economy. Looking at some used coaches I have been looking at the on board fuel economy indicators. Looks like ~5 mpg on good days.
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Dennis
Bohemia NY
2008 Nimbus 342 SE Carlyle
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02-06-2025, 06:35 AM
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#8
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Senior Member
Tiffin Owners Club
Join Date: Sep 2012
Location: Columbus, NJ
Posts: 3,071
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Quote:
Originally Posted by d23haynes57
A consideration for the 605 is fuel economy. Looking at some used coaches I have been looking at the on board fuel economy indicators. Looks like ~5 mpg on good days.
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Good point. I got 8.7 mpg (no toad) with my 450 HP on the 1200-mile drive bringing it home from Florida.
__________________
Larry & Cheryl Herman - Ranger, Henry, Georgie & Enzo (our Springers)
2019 Tiffin Allegro Bus 45OPP
2016 Ford Transit Connect on a Demco dolly
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02-10-2025, 02:10 PM
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#9
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Senior Member
Monaco Owners Club Coastal Campers
Join Date: Mar 2012
Posts: 2,250
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Quote:
Originally Posted by d23haynes57
A consideration for the 605 is fuel economy. Looking at some used coaches I have been looking at the on board fuel economy indicators. Looks like ~5 mpg on good days.
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I get 6 24 on my dynasty. lol
So the mpg is less on a 650 vs 450?
__________________
2019 Allegro Bus 45 OPP
2001 Monaco Dynasty tag axle
2018 Jeep Grand Cherokee
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02-10-2025, 03:17 PM
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#10
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Senior Member
Join Date: Jun 2021
Location: Hayden, Al
Posts: 296
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Quote:
Originally Posted by d23haynes57
A consideration for the 605 is fuel economy. Looking at some used coaches I have been looking at the on board fuel economy indicators. Looks like ~5 mpg on good days.
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Fuel economy will depend on the driver as much as engine size, if are a eazy driver you should get better mileage with the 605, if you drive it like the 450 you have now.
__________________
2007 Tiffin Phaeton 40QDH
2003 Honda Element / 2016 SlingShot
Alabama "Roll Tide"
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02-10-2025, 05:53 PM
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#11
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Senior Member
Monaco Owners Club Coastal Campers
Join Date: Mar 2012
Posts: 2,250
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Quote:
Originally Posted by hastemaker
Fuel economy will depend on the driver as much as engine size, if are a eazy driver you should get better mileage with the 605, if you drive it like the 450 you have now.
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I currently have a Dynasty with a 350 lol
__________________
2019 Allegro Bus 45 OPP
2001 Monaco Dynasty tag axle
2018 Jeep Grand Cherokee
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02-10-2025, 07:16 PM
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#12
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Senior Member
Join Date: Mar 2024
Location: Bohemia NY
Posts: 2,625
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Quote:
Originally Posted by hastemaker
Fuel economy will depend on the driver as much as engine size, if are a eazy driver you should get better mileage with the 605, if you drive it like the 450 you have now.
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Scroll through to picture 37. This is typical of the large bore engines.
https://www.legacycoach.com/default....il&id=16604803
Best I saw was a 2009 C15 @ 5.5 mpg.
__________________
Dennis
Bohemia NY
2008 Nimbus 342 SE Carlyle
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02-11-2025, 07:22 AM
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#13
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Senior Member
Tiffin Owners Club
Join Date: Sep 2012
Location: Columbus, NJ
Posts: 3,071
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Quote:
Originally Posted by d23haynes57
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__________________
Larry & Cheryl Herman - Ranger, Henry, Georgie & Enzo (our Springers)
2019 Tiffin Allegro Bus 45OPP
2016 Ford Transit Connect on a Demco dolly
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02-11-2025, 11:09 AM
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#14
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Senior Member
Tiffin Owners Club
Join Date: Jun 2017
Location: Odessa, FL
Posts: 1,149
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Quote:
Originally Posted by d23haynes57
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YIKES!!!!
__________________
2023 Tiffin Allegro Bus 45OPP
2019 Birkshire 34QS - Traded
2020 Jeep Cherokee Trailhawk with BlueOx/AF1
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