2.25 vs 2.5 engine

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  • bronsonarlo
    Low Range
    • Mar 2008
    • 29
    #1

    2.25 vs 2.5 engine

    How do you tell the difference between a 5mb 2.25 petrol and 2.5 petrol?
    Any physical differences in the block or head to distinguish them?
    Tags: None
    • SafeAirOne
      Overdrive
      • Apr 2008
      • 3435
      #2
      Originally posted by bronsonarlo
      Any physical differences in the block or head to distinguish them?
      Sure. The serial number, stamped in the block somewhere (different locations, depending on engine) will tell all.

      The different engine serial number codes are all listed here.
      --Mark

      1973 SIII 109 RHD 2.5NA Diesel

      0-54mph in just under 11.5 minutes
      (9.7 minutes now that she's a 3-door).

        Comment

        • scott
          Overdrive
          • Oct 2006
          • 1226
          #3
          the block of the 2.5 has diagnol raised ridges along the bottom
          '64 Series IIA 88 Canvas Tilt
          '68 Series IIA RHD Ambulance
          '76 Spitfire 1500
          '07 LR3 (Series Recovery Vehicle)

            Comment

            • bronsonarlo
              Low Range
              • Mar 2008
              • 29
              #4
              Thanks! Looks like it is an early defender 2.25.

                Comment

                • SafeAirOne
                  Overdrive
                  • Apr 2008
                  • 3435
                  #5
                  Originally posted by bronsonarlo
                  Thanks! Looks like it is an early defender 2.25.

                  A 13H engine?
                  --Mark

                  1973 SIII 109 RHD 2.5NA Diesel

                  0-54mph in just under 11.5 minutes
                  (9.7 minutes now that she's a 3-door).

                    Comment

                    • yorker
                      Overdrive
                      • Nov 2006
                      • 1635
                      #6
                      Originally posted by scott
                      the block of the 2.5 has diagnol raised ridges along the bottom
                      Yeah but so do the 5 main bearing 2.25s...
                      1965 SIIa 88",1975 Ex-MOD 109/Ambulance, 1989 RRC, blah, blah, blah...

                      Land Rover UK Forums

                        Comment

                        • scott
                          Overdrive
                          • Oct 2006
                          • 1226
                          #7
                          Originally posted by yorker
                          Yeah but so do the 5 main bearing 2.25s...
                          are they the same? will they take the same head and manifolds?
                          Last edited by scott; 07-30-2010, 12:34 PM.
                          '64 Series IIA 88 Canvas Tilt
                          '68 Series IIA RHD Ambulance
                          '76 Spitfire 1500
                          '07 LR3 (Series Recovery Vehicle)

                            Comment

                            • bronsonarlo
                              Low Range
                              • Mar 2008
                              • 29
                              #8
                              It is a 11H engine.

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