List of Subaru engines

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Subaru uses a four or five digit code to identify all of their engines.

  • The first letter is always E standing for engine.
  • The next letter is the engine's family.
  • The next two numbers identify the engine's displacement (or revision before 1989)
  • The fifth character is an identifier to mark revisions, (ex: turbo, DOHC, Fuel Injection, etc)

Two Cylinder

All of Subaru's two cylinder engines are inline. They make Two-stroke cycle and Four-stroke cycle


Three Cylinder

All of Subaru's three cylinder engines are inline Four-stroke cycle design, Liquid Cooled.

Subaru EF-12 Engine

Subaru EF engine

Four Cylinder

All of Subaru's four cylinder engines (except the rare EN80) are a horizontally opposed Boxer Four-stroke cycle design, Liquid Cooled.

Subaru EA engine

The EA was used from 1966 until 1994 in most models. It is a basic 2 valve per cylinder design with siamese ports.

Subaru EA Engine

Subaru EJ engine

The EJ engine was introduced in the 1989 Subaru Legacy to replace the EA engines (although they were used in the Subaru Leone until 1994. These engines have four valved per cylinder and can be either SOHC or DOHC, the fifth digit is the only way to tell without seeing the engine.

Subaru EJ22E Engine

Subaru EN engine

The EN08 engine was used in the Fiori in Australia and some other markets. It was an inline 4-cylinder of 758cc, naturally aspirated with a single carburetor developing 31kW @ 6000rpm.

Boxer Diesel

Subaru unveiled the world's first boxer diesel engine at the Geneva autoshow in 2007. This 2.0L DOHC engine has 163HP and 251b-ft and was released in Europe in 2008. It is scheduled to be released in North America in 2010. [1]

Six Cylinder

All of Subaru's six cylinder engines are a Flat-6 Four-stroke cycle design, Liquid Cooled.


Subaru introduced its first six cylinder engine in its Subaru XT sports car. This SOHC engine was based on the EA82, with two cylinders added to the back.


The EG engine was a direct replacement for the ER found in the Subaru XT sports car. Replacing it was the Subaru Alcyone SVX so Subaru needed a new engine. As with the ER27, Subaru took the EJ22 and stretched it two cylinders to make the new EG33. However, this four valve per cylinder engine was DOHC and valvetrain parts from the not yet released EJ25D.


Instead of stretching their current EJ20 as most might suspect, in 2000 Subaru did this family from the ground up. It is a totally new DOHC design using dual timing chains and coil-on-plug ignition. Nothing from these engines are interchangeable with any other Subaru engine as in the past. The EZ36 was introduced in 2008 to help the Tribeca's sluggish performance. It is a bored and stroked version of the EZ30.

Engine specifications EZ30 Type: flat-6, aluminum block and heads
Bore x stroke: 3.51 x 3.15 in, 89.2 x 80.0 mm
Displacement: 183 cu in, 3000 cc
Compression ratio: 10.7:1
Fuel-delivery system: port injection
Valve gear: chain-driven double overhead cams, 4 valves per cylinder, hydraulic lifters, variable intake- and exhaust-valve timing and lift
Power (SAE net): 256 bhp (191 kW) @ 6000 rpm
Torque (SAE net): 247 lb·ft (335 N·m) @ 4400 rpm
Redline: 7000 rpm


  1. Boxer Diesel

See also

External links