compression ratio SUBARU IMPREZA WRX 2002 2.G Owners Manual

Specifications
12-3
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Engine
Engine model
EJ251
(2.5-liter, SOHC, non-turbo)EJ205
(2.0-liter, DOHC, turbo)
Engine typeHorizontally opposed, liquid cooled 4 cylinder, 4-stroke gasoline engine
Displacement cu in. (cc)149.9 (2,457)121.7 (1,994)
Bore × Stroke in. (mm)3.92 × 3.11 (99.5 × 79.0)92.0 × 75.0 (3.62 × 2.95)
Compression ratio10.0 : 18.0 : 1
Firing order1 – 3 – 2 – 4
Electrical system
Battery type
di tEurope modelMT12V-48AH (55D23L)and capacity (5HR)ATWith 2.5-liter engine12V-52AH (75D23L)(5HR)With 2.0-liter engine12V-52AH (65D23L)
Alternator2.5-liter engine12V – 75A
2.0-liter engine12V – 75A
Spark plugs2.5-liter engineBKR6E-11 (NGK)
BKR5E-11 (NGK)
RC10YC4 (Champion)
2.0-liter turbo enginePFR6G (NGK)
AT : Automatic transmission MT : Manual transmission