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  1. #1

    Default 4x4 power

    I just bought my first 4wd tractor. It has the same hp as my 2wd but feels like twice the power! Is there a comparison chart or something of that nature that may compare 2wd hp to 4wd hp for example a 45 hp 4wd is equal to a 65 hp 2wd. I'm just interested in your thoughts.
    Thanks, Ken

  2. #2
    Platinum Member
    Join Date
    Jul 2000
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    951
    Location
    Sierra Foothills, Northern California
    Tractor
    Kubota B7300; JD LX233

    Default Re: 4x4 power

    Well, I'm a software engineer, which doesn't make me an expert in this field, but my guess is that you feel like you have more power because you have more traction. I see the quote "I run out of traction before I run out of power" all the time on this board (I'm a long time lurker, recent member), so it would seem to reason that doubled traction equates to doubled "usable power".

    Or perhaps your new motor just has more torque ;-)...

  3. #3
    Super Member
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    frank_f15's Avatar
    Join Date
    Mar 2001
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    6,033
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    BUFFALO ,NEW YORK AREA
    Tractor
    kubota b2400- R4 tires

    Default Re: 4x4 power

    I don't think it is a question of power! just that 4wd gives u so much more traction u think u are superman. i would never consider a 2 wd tractor again. just mho

  4. #4

    Join Date
    May 2001
    Posts
    40
    Location
    south central Arkansas
    Tractor
    2001 NH 33D

    Default Re: 4x4 power

    I could not believe the difference myself between 2WD and 4WD.My old tractor was just 2WD and i was always losing traction,traded for a 4WD and WOW! I didn't know what i was missing.

  5. #5

    Join Date
    Jan 2002
    Posts
    280
    Location
    Western N.C. from New Orleans.
    Tractor
    MF 220 - Long 2360- Kioti 3054

    Default Re: 4x4 power

    I'll give you my comments on this next week. I just bought my first 4x4 tractor today. Will have it delievered next monday. I have two tractors that are 2x4 used for upkeep on same steep driveway. one with ag tires, one with turfs. Next week, we will see how much difference the 4x4 makes.
    Bill

  6. #6
    Veteran Member
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    Jan 2002
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    1,927
    Location
    Home-1+ acres New Hope, TX / 24 acres-Fannin County
    Tractor
    JD 950

    Default Re: 4x4 power

    4wd can't add hp to the engine. It does obviously add traction. If you are in 2 wd and the rear tires do not lose traction, then you are applying the same hp to the ground as you would in 4 wd. In most cases though, you have more hp than traction. That is where 4wd adds to your pulling power.

  7. #7

    Join Date
    Apr 2001
    Posts
    457
    Location
    New York - Upstate
    Tractor
    Kubota 2710

    Default Re: 4x4 power

    I am a little more skeptical than most regarding the extra traction theory. I personally don't use 4wd unless I have to, so just trotting around the farmstead, I'm in 2wd. If you don't have 4wd engaged, then I would probably look to a higher torque rating as someone already suggested. That, or the 2wd tractor's engine is a bit "tired" and the 4wd engine is fresh and rarin' to go[img]/w3tcompact/icons/wink.gif[/img]

  8. #8

    Default Re: 4x4 power

    Rule of Thumb 20 ~ 25 Percent Increase in effective Drawbar HP using a MFWD Tractor versus a 2-WD Tractorů


  9. #9

    Join Date
    Sep 2001
    Posts
    34
    Location
    Lebanon, IN
    Tractor
    New Holland TC33D w/SS

    Default Re: 4x4 power

    The rule of thumb that JMIII mentions is the same that I've heard. I think it's important to note that it is the draw-bar Hp, the Hp transmitted to the ground; this would account for the traction.

  10. #10

    Join Date
    Apr 2001
    Posts
    457
    Location
    New York - Upstate
    Tractor
    Kubota 2710

    Default Re: 4x4 power

    Clearly this must be with MFWD engaged?? Some (including me) might take his initial post to mean that "out of the box" (not in 4wd mode), this tractor "feels" more powerful. Is that what you meant, qzbmpc?

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