Engine Compression

1991 Subaru Legacy L, 4D Sedan, AWD, StandardSECTION Engine Compression
COMPRESSION SPECIFICATIONS

Application Specification
Compression Ratio
Non-Turbo 9.5:1
Turbo 8.0:1
Compression Pressure
Non-Turbo 156-185 psi (11.0-13.0 kg/cm2 )
Turbo 142-171 psi (10-12 kg/cm2 )
Maximum Variation Between Cylinders 28 psi (2.0 kg/cm2 )
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.