Engine Compression
WARNING: This page is about a different car, the 1993 Audi 90 and 1993 Audi 100. However, it is still accessible from the selected car via links, so may be relevant.
Check engine compression with engine at normal operating temperature, all spark plugs removed, fuel injector harness disconnected and throttle wide open.
NOTE:
Connect coil high tension wire to ground before cranking engine for compression test.
COMPRESSION SPECIFICATIONS
| Application | Specification | |
|---|---|---|
| Compression Ratio | 10.3:1 | |
| Compression Pressure | ||
| Normal | 156-228 psi (11-16 kg/cm2 ) | |
| Minimum | 128 psi (9 kg/cm2 ) | |
| Maximum Variation Between Cylinders | 44 psi (3 kg/cm2 ) | |