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Engine Compression

COMPRESSION SPECIFICATIONS

Application Specification
Compression Ratio
XJS 11.5:1
XJ6 9.5:1
Compression Pressure (1)
XJS 200-220 psi (14.1-15.5 kg/cm2 )
XJ6 (2) 150-160 (10.5-11.2kg/cm2 )
XJ6 (3) 160-170 (10.5-11.2kg/cm2 )
Maximum Variation Between Cylinders
XJS 35 psi (2.4 kg/cm2 )
XJ6 10 psi (.70 kg/cm2 )
(1) Minimum cranking speed is 300 RPM.
(2) 1990 model
(3) 1991 model
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