Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSPORSCHE1982928 AUTOMATIC TRANSREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESPECIFICATIONSTUNE-UP - V8ENGINE COMPRESSION

1982 Porsche 928 Automatic Trans

Engine Compression

1982 Porsche 928 Automatic TransSECTION Engine Compression

With engine at normal operating temperature, remove all plugs and allow 12 compression strokes per cylinder.

COMPRESSION SPECIFICATIONS

Compression Ratio		9:1
Compression Pressure
	Normal	142-199 psi (10-14 kg/cm² )
	Minimum	114 psi (8 kg/cm² )
Max. Variation
	Between Cylinders	21 psi (1.5 kg/cm² )

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

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

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