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