LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Porsche >> 1989 >> 911 Turbo, 2D Convertible >> Repair and Diagnosis >> Engine Performance >> Specifications >> Mechanical Checks >> Engine Compression
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Engine Compression

COMPRESSION SPECIFICATIONS

Application Specification
Compression Ratio 9.5:1
Compression Pressure
Normal 142-184 psi (10-13 kg/cm2 )
Minimum 107 psi (7.5 kg/cm2 )
Maximum Variation Between Cylinders 22 psi (1.5 kg/cm2 )
scientia non olet · About LEMON Manuals