Subaru WRX & WRX STI Manuals 2014 Impreza WRX & WRX STI Owner's Manual | Page 372

Specifications/Specifications

12-3

& Engine
Engine model

EJ255
(2.5 L, DOHC, turbo, except STI)

Engine type

EJ257
(2.5 L, DOHC, turbo, STI)

Horizontally opposed, liquid cooled 4 cylinder, 4-stroke gasoline engine

Displacement cc (cu-in)

2,457 (150)

Bore 6 Stroke in (mm)

3.9 6 3.1 (99.5 6 79.0)

Compression ratio

8.4 : 1

8.2 : 1
1–3–2–4

Firing order

& Electrical system
Battery type and capacity (5HR)

MT

Alternator

Turbo models

12V-110A

Spark plugs

Turbo models

SILFR6A (NGK)

12V-48AH (55D23L)

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