Subaru Subaru EJ257 Engine Specs
Subaru
Quick overview
Subaru Subaru EJ257 is a 2.5L (2457 cc) petrol engine with 300 HP, 407 Nm, 8.2:1 compression ratio. Fuel consumption: 13-10L/100km. Typical service life: 150,000+.
300
HP
2.5L (2457 cm³)
Displacement
407 Nm
Torque
Petrol
Fuel
Description
The Subaru EJ257 is a 2.5-liter turbocharged flat-4 (boxer) engine that powered the WRX STI. Known for its distinctive boxer layout, aggressive turbocharging, and rally-bred performance characteristics. Features forged internals and is capable of handling significant power modifications.
General Information
Production Years:
2004-2014
Fuel Type:
Petrol
Environmental Standards:
Euro 4
Fuel Consumption:
13-10L/100km (23.5-18.1 mpg)
Power (HP):
300
Power (kW):
220
Displacement:
2.5L (2457 cm³) (149.9 cu.in)
Torque:
407 Nm (300 lb-ft)
Cylinder Block Alloy:
Aluminum alloy
Cylinder Head Alloy:
Aluminum alloy
Has Turbo:
Yes
Engine Layout:
Boxer-4
Aspiration Type:
Turbocharged
Fuel System:
Multi-point Fuel Injection
Head Type:
DOHC Aluminum
Timing Drive:
Timing Belt
Cooling Type:
Liquid Cooled
Cylinders Count:
4
Technical Details
Cylinder Diameter:
99.5mm
Piston Stroke:
79mm
Total Valves:
16
Total Intake Valves:
8
Total Exhaust Valves:
8
Intake Valves per Cylinder:
2
Exhaust Valves per Cylinder:
2
Firing Order:
1-3-4-2
Weight:
125 kg (276 lbs)
Rings per Piston:
3 (2/1)
Compression Ratio:
8.2:1
Hydraulic Lifters:
No
Cylinder Coating:
Cast iron sleeve
Minimum Octane:
95
Maintenance
Oil Capacity:
4.2L (4.4 qts)
Recommended Oil:
5W-30
Operating Temperature:
85-95°C (185-203°F)
Thermostat Temperature:
87-92°C (189-198°F)
Service Life (km):
150,000+ (93 miles)
Timing Belt/Chain Interval:
Belt - 105,000 km or 7 years
Parts Cost:
High - specialized boxer engine parts