M40 compression ratio

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  • kevster30
    Noobie
    • Apr 2004
    • 14

    #1

    M40 compression ratio

    Hello all,

    Anyone out here able to help me with the compression ratio figures for the M40 motor?

    Thanks in advance!
  • Mike 91 318ic
    E30 Addict
    • Jun 2004
    • 429

    #2
    just a guess but I think it's 10:1 We don't have the M40 motor in North America so i don't know too much about them.

    M

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    • BavarianBimmer
      E30 Modder
      • Oct 2003
      • 951

      #3
      9.0 for the M40b16
      8.8 for the M40b18

      these are the ECE specs and with cat. ;)

      1989 E30 318iS_______________________________1989 E30 325iC M-Technic I
      1997 E36 328iT
      1990 E30 325iT 24v SOLD
      1989 E30 325i 2.7i M-Technic II SOLD

      Comment

      • kevster30
        Noobie
        • Apr 2004
        • 14

        #4
        Thanks for the reply guys! :D

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