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Volvo Penta 8.1 GI-J

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  • Volvo Penta 8.1 GI-J

    Purchased a used boat, 2008 Chaparral 256 ssx. The owner says the dealer told him it was 375 hp the title has the horsepower listed at 400. How do I found out the exact horsepower?

    Engine tag info
    8.1 GI-J

    Thank for your help

  • #2
    Ayuh,...... Welcome Aboard,...... Google says 375 horsepower,.......


    • #3
      Title is incorrect and wouldn't be the first time something was entered incorrectly, tht is unless someone has rebuilt the motor with hp parts
      94 Formula 27PC Custom 509MPI MEFI3 , B3 XR
      95 Rinker 232 w/ 7.4L Carb 0F425011 B1 0F486471
      07 Seadoo GTX
      Merc Adults Only VP Adults Only
      G-Dad always said "First Liar doesn't stand a chance"


      • #4


        • #5

          This is what Volvo Penta has to say about it.

          Serial Number4012239406
          DriveLineVPH1 351540
          Manufacturing Date1/10/2008
          Shipped Date1/14/2008
          Delivery Date9/30/2008
          Detailed Segment - as soldMarine Leisure Gas
          Engine running hours (latest known)0
          Location (best known)United States, , KINGWOOD
          EndCustomerInteraction 5/6/2014
          Aftermarket Changes No
          Control System
          Control System Version
          Rated Power 280 kW 375 hp @ prop shaft
          Rated Speed
          Rating 5 High Performance & Pleasure Duty
          Product Name G8-A-AQ-38
          Product Designation 8.1Gi-J
          Part Number 3869411
          Production Period 2007-2009
          Number Of Cylinders 8
          Bore 108.00 mm
          Stroke 111.00 mm
          Compression Ratio 9.1:1
          Displacement 8.13 liters
          Last edited by muc; March 7th, 2019, 10:03 PM.
          Good Luck Muc


          • #6
            Great info.!!! Thank you!


            • #7
              Funny thing this. When it comes to boasting about the HP of your boat around the marina...you’ll find all sorts of optimistic claims on power and speed. When it comes to the length of the boat...you’ll find most are on the pessimistic side....just in case the marina owner is listening and charges you that extra $$$ for the extra foot of length....haha. True story !


              • #8
                At the bar --- it's 32 feet
                At the marina --- it's 28 feet
                But they bought a 30 ft
                Good Luck Muc


                • #9
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                  Originally posted by muc View Post
                  At the bar --- it's 32 feet
                  At the marina --- it's 28 feet
                  But they bought a 30 ft
                  Haha. True.