Engine size

Discussion in 'Tech/Mech General' started by Teuchter, Mar 29, 2015.

  1. Teuchter

    Teuchter Funster

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    I have a 2.7 automatic A class Mercedes Rapido weighing in at about 3600 Kg and find the power to weight ratio completely satisfactory. I am looking for a new or nearly automatic motorhome of a similar spec. and they mostly have 2.2 Mercedes or 2.3 Fiat engines so I am a bit concerned that they may be underpowered and the 3.0 models are far rarer (and much more expensive)

    What to do?

    Any thoughts?
     
  2. NickNic

    NickNic Funster Life Member

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    Our Rapido is plated at 3850 and has the 2.3 engine. I don't find it under powered at all.
     
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  3. Terry

    Terry Funster

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    Stick to what you have ;):D
    terry
     
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  4. rosalan

    rosalan Funster

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    In the past, the bigger the engine the better but over the last nine years engine design has improved enormously, with more economical and powerful engines that now have the capacity that a few years ago, would be associated with an average car. I have a standard 2.3 Fiat turbo that easily goes up the steepest hills, usually in sixth gear, pulling my 3.8 ton van far better than my old 2.8 litre could pull a much lighter van. I also get around 30mpg whereas my older van may get 25mpg on a good day.
    Alan
     
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  5. JeanLuc

    JeanLuc Funster

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    With the Merc, it depends on the specification of the 2.2 litre engine. Assuming your current Rapido is from the early 2000s, its 2.7 (CDi) has a power output of 156 bhp (nominally referred to as a 160 engine). The newer 2.2 versions can have various power outputs - 95 bhp, 129 bhp, 163 bhp. Check which spec is on any van you are interested in. I would think either the 129 or 163 would be good. The newer engines have better torque output I believe, and the new auto boxes have 6 (or more) ratios.

    I have the same set-up as you: 316 chassis (with 2.7 engine) 5-speed full auto box. The GVW is 3,800 kg and the combination has loads of oomph!
     
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  6. Hogan7777

    Hogan7777 Read Only Funster

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    We have a 3 ltr in our 4500kg Hymer and its way to powerful. Don't even have to change down going over the Pyrenees ,unless on the back roads.
     
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  7. Moodybrook

    Moodybrook Funster

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    Interesting user name for a Lee on Solent resident, You in exile ma loon ? :)

    On the power to weight jobbie I think the engine cc is sometimes irrelevent as the same engine with different chip profile can have either higher speed/revs or max torque. Very different equations. My 2.2 can have 100, 130, 150 ratings.

    Some grease monkey will be along soon and clarify it all. (y)
     
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  8. John Laidler

    John Laidler Funster

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    What horsepower is it?
     
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  9. Teuchter

    Teuchter Funster

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    Thanks for your reply - I am indeed in exile, originally from Portmahomack on the Dornoch Firth about 40 miles North of Inverness, arrived here via 24 short but colourful years service in the RN
     
  10. Teuchter

    Teuchter Funster

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    I think 156hp
     
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  11. Popeye

    Popeye Funster

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    ...and your Avatar, a Centaur or maybe a Griffon?


    I have argued on here on many occasions the benefits of the larger engine, and even today with engines becoming more and more thermally efficient, there ain't no substitute for CUBES.

    The smaller very efficient engines will pull you along more than adequately, the larger engine will do it without breaking into a sweat and probably without changing down.
     
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  12. Lenny HB

    Lenny HB Funster

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    I'm on my second 2.3 Fiat a cracking engine very smooth with loads of power, first one was a 130ps, current one a 150ps.
    The 130 had plenty of power would pull a fully laden 3.5T van up the steepest hills & cruise at highly illegal speeds on motorways. The 150 certainly has a lot more grunt and worth the extra dosh, should only need the 3Lt in the biggest heaviest vans, it's a lot of extra dosh & carries a 50kg weight penalty.
     
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  13. Teuchter

    Teuchter Funster

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    Avatar - my Macwester Rowan Crown
     
  14. John Laidler

    John Laidler Funster

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    The Fiat 2.5 litre engine has more or less the same power but as you have an automatic, which I assume is a torque converter one, not the SprintShift then you would probably get pretty much the same amount of power at the rear wheels as you have now with a 2.3 litre Fiat engine and the Comfortmatic 'box.
     
  15. Popeye

    Popeye Funster

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    I can see it is now, they were produced down near where I work in Littlehampton, crackin' little boat...........Griff
     
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