Engine EJ25

The EJ25 engine, which had a displacement of 2.5 liters, was launched by Subaru in 1995. The block of this engine was identical to the block of the EJ20 engine – just like its older brother, it was made of aluminum alloy and had a height of 201 mm. The only difference was in the diameter of the cylinders – unlike the 2.0-liter engine, which had 92 mm, the 2.5-liter engine had 99.5 mm. The block housed a crankshaft with a piston stroke of 79 mm. The length of the connecting rods was 130.5 mm, and the piston height was 30.7 mm.

Specifications

Manufacturer Gunma Oizumi Plant
Also called EJ25
Production years 1996
Cylinder block alloy aluminum
Fuel system injector
Configuration boxer engine
Number of cylinders 4
Valves per cylinder 4
Piston stroke, mm 79
Cylinder bore, mm 99.5
Compression ratio 8.2 (EJ257)
8.4 (EJ255)
8.7 (EJ257)
9.5 (EJ25D 1996)
9.7 (EJ25D 1997-1999)
10.1 (EJ251/EJ252/EJ253)
10.7 (EJ254)
Displacement, cc 2457
Power output, hp 155/5600
165/5600
165/5600
173/5600
170/6000
210/5600
230/5600
250/6000
265/6000
280/5600
300/6000
Torque output, Nm / rpm 190/2800
220/4000
226/4400
225/4000
238/2800
320/3600
320/3600
339/3600
347/2800
392/4000
407/4000
Fuel type 95-98
Euro standards
Weight, kg ~120
Fuel consumption, L/100 km (for WRX STI VA)
— city
— highway
— combined
14.0
8.4
10.4
Oil consumption, gr/1000 km up to 1000
Recommended engine oil 0W-30 / 5W-30 / 5W-40 / 10W-30 / 10W-40
Engine oil capacity, liter 4.0 (EJ25D, EJ25 2007+)
4.5 (2000-2007)
4.3(WRX/STI 2000+)
Oil change interval, km 15000
(better 7500)
Normal engine operating temperature, °C
Engine lifespan, km
— official information
— real

250+

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