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Thread: M20B25 compression without opening the engine?

  1. #1
    Join Date
    Jan 2016
    Location
    Buenos Aires, Argentina
    Posts
    62

    Default M20B25 compression without opening the engine?

    Hi guys, is there any way to know the compression ratio of the engine, without opening it?


    My car was manufactured on nov 1988, its a euro 525i, no cat. Thanks for any help.




    VIN info:


    Vehicle Identification Number WBAHC210904237760
    Type HC21
    Model 525i - EUR
    Development Code E34
    Chassis LIM
    Steering LL
    Doors 4
    Engine M20
    Displacement 2.50
    Power 125
    Drivetrain HECK
    Transmission AUT
    Color Royalblau Metallic - 198
    Upholstery Indigo Leder - 0293
    Production Plant
    Production Date 1988-11-14


    Options
    200 Katalysator - Entfall Katalysator - Entfall
    226 Sports Suspension Settings Sportliche Fahrwerksabstimmung
    314 Heated Windscreen Washer Nozzles Frontscheibenwaschduesen Beheizt
    355 Laminated Glass Verbundverglasung
    401 Sliding/vent Roof, Electric Schiebe-hebedach, Elektrisch
    411 Window Lifts, Electric Fensterheber,elektrisch Vorn/hinten
    498 Headrests In Rear, Mechanic. Adjustable Kopfstuetzen Im Fond
    534 Automatic Air Conditioning Klimaautomatik
    553 On-board Computer Iv W Remote Control Bordcomputer Iv Mit Fernbedienung
    570 Stronger Electricity Supply Staerkere Stromversorgung
    651 Bmw Bavaria C Reverse Bmw Bavaria C Reverse
    823 Hot Climate Version Heissland-ausfuehrung
    850 Add Fuel Tank Filling For Export Zusaetzl. Tankfuellung Export
    856 Language Version Spanish Sprachversion Spanisch
    925 Shipping Protection Package Versandschutzpaket
    E34 525i '88

  2. #2
    Join Date
    Dec 2003
    Location
    Eastern Tennessee USi
    Posts
    14,570

    Default

    9.7:1
    95 E34 530I V2.17
    ===========
    Those who make peaceful revolution impossible will make violent revolution inevitable.

    John F. Kennedy

  3. #3
    Join Date
    Jan 2016
    Location
    Buenos Aires, Argentina
    Posts
    62

    Default

    Sh*t, i thought so ... there goes my easy way to boost it. i guess ill add a thick MLS gasket to the shopping list.

    thx for the reply.
    E34 525i '88

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