Since 1989, Subaru has assembled its EJ20 2.0-liter turbo engine in Japan, which powers a number of well-known models.
Since the engine was frequently improved, there are a number of variations that differ significantly:
From 1989 to 1998, the EJ20G was assembled in Japan and fitted to charged versions of well-known vehicles like the Legacy, Forester, and Impreza. This motor has three variations, each with a unique design and level of forcing.
The EJ205 was put together between 1998 and 2007 and installed on sports versions of well-known vehicles like the Forester and the Impreza. There were two versions of the motor: an advanced version with 220–230 horsepower and a standard version with 170–180 horsepower.
Only sports versions of the Legacy model were equipped with EJ206, which was manufactured between 1998 and 2003 for the regional auto market. There was only one version of this power unit, which had a 260 horsepower and 320 Nm capacity.
Produced since 1998, the EJ207 is exclusively installed on the Impreza WRX STi, though it has recently been limited to the local market. This motor comes in three different versions: basic, with the AVCS system, and with a twin scroll turbine.
From 1998 to 2003, the EJ208 was assembled and installed exclusively on different sports modifications of the Legacy model for the local market. There was only one version of this power unit available, which had a 280 horsepower and 343 Nm capacity.
Additionally, this motor has a number of atmospheric modifications that are combined into the EJ20 series.
Specifications
| Start of production | 1989 |
| Displacement, cc | 1994 |
| Fuel system | injector |
| Power output, hp | 200 – 220 (EJ20G Rocker-style HLA) 220 – 275 (EJ20G Bucket-style HLA) 210 – 250 (EJ20G Shim-over-bucket style) 170 – 180 (EJ205 basic) 220 – 230 (EJ205 sport) 260 (EJ206) 265 – 280 (EJ207 basic) 270 – 300 (EJ207 with AVCS) 308 – 328 (EJ207 Twin Scroll) 280 (EJ208) |
| Torque output, Nm | 260 – 270 (EJ20G Rocker-style HLA) 260 – 320 (EJ20G Bucket-style HLA) 260 – 310 (EJ20G Shim-over-bucket style) 240 – 250 (EJ205 basic) 290 – 300 (EJ205 sport) 320 (EJ206) 340 – 350 (EJ207 basic) 350 – 380 (EJ207 with AVCS) 430 (EJ207 Twin Scroll) 343 (EJ208) |
| Cylinder block | aluminum H4 |
| Block head | aluminum 16v |
| Cylinder bore, mm | 92 |
| Piston stroke, mm | 75 |
| Compression ratio | 8.0 (EJ20G Rocker-style HLA) 8.0 – 8.5 (EJ20G Bucket-style HLA) 8.0 – 8.5 (EJ20G Shim-over-bucket style) 8.0 (EJ205 basic) 8.5 – 9.0 (EJ205 sport) 9.0 (EJ206) 8.0 (EJ207) 8.5 – 9.0 (EJ208) |
| Features | DOHC |
| Hydraulic lifters | no |
| Timing drive | belt |
| Phase regulator | no (all except EJ207 with AVCS, EJ207 Twin Scroll) AVCS (EJ207 with AVCS, EJ207 Twin Scroll) |
| Turbocharging | MHI TD04 (EJ20G Rocker-style HLA) MHI TD04 / TD05H (EJ20G Bucket-style HLA) MHI TD04 / TD05H (EJ20G Shim-over-bucket style) Twin-Turbo (EJ206) single scroll (EJ207 basic, EJ207 with AVCS) Twin Scroll (EJ207 Twin Scroll) Twin-Turbo (EJ208) |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 4.7 |
| Fuel type | petrol |
| Euro standards | EURO 1/2 (EJ20G Rocker-style HLA) EURO 2/3 (EJ20G Bucket-style HLA, EJ205, EJ206, EJ207 basic, EJ208) EURO 3 (EJ20G Shim-over-bucket style, EJ207 with AVCS) EURO 3/4 (EJ207 Twin Scroll) |
| Fuel consumption, L/100 km (EJ20G for Subaru Impreza 1995) — city — highway — combined |
13.7 8.0 9.9 |
| Engine lifespan, km | ~225 000 |
| Weight, kg | 150 (EJ20G) 160 (EJ205) 170 (EJ206, EJ208) 165 (EJ207) |
Disadvantages of the EJ20T engine
Controlling oil pressure is essential to a turbo engine’s long-term performance.
The unit’s wedge and liners rotate as soon as the lubrication level drops;
Here, oil is used for waste as well as leaks from gaskets and seals; an inefficient cooling system frequently causes engine overheating;
Knocks under the hood are a sign that the motor has overheated.