The Subaru EA engine is a series of automobile

Automobile

An automobile, autocar, motor car or car is a wheeled motor vehicle used for transporting passengers, which also carries its own engine or motor...

 internal combustion engines manufactured by Subaru

Subaru

; is the automobile manufacturing division of Japanese transportation conglomerate Fuji Heavy Industries .Subaru is internationally known for their use of the boxer engine layout popularized in cars by the Volkswagen Beetle and Porsche 911, in most of their vehicles above 1500 cc as well as...

, a division of Fuji Heavy Industries

Fuji Heavy Industries

, or FHI, is a Japanese transportation conglomerate most known for being the manufacturer of Subaru automobiles. It traces its roots to the Nakajima Aircraft Company, a leading supplier of airplanes to the Japanese government during World War II...

. All EA series engines are of a flat-4

Flat-4

A flat-4 or horizontally opposed-4 is a flat engine with four cylinders arranged horizontally in two banks of two cylinders on each side of a central crankcase...

 design.

The EA series engines have aluminum heads with aluminum blocks. Each cylinder has two valves, one for exhaust and one for intake. They came in either an OHV

Overhead valve

An overhead valve engine, also informally called pushrod engine or I-head engine, is a type of piston engine that places the camshaft within the cylinder block , and uses pushrods or rods to actuate rocker arms above the cylinder...

 pushrod or SOHC configuration.

Subaru produced the EA series from 1966 to 1994, and were found in the Subaru FF-1 and the Subaru Leone

Subaru Leone

The Subaru Leone was a compact car produced by the Japanese car manufacturer Fuji Heavy Industries from 1971 to 1994. The word "leone" is Italian for lion....

.

EA-52

The Subaru EA-52 engine was produced from 1966–1970, and from 1970-1971 in the United States.

Specifications

• Displacement: 977.2 cc
• Bore: 72 mm
• Stroke: 60 mm
• Compression Ratio: 9.0:1
• Valvetrain: OHV
  Overhead valve
  An overhead valve engine, also informally called pushrod engine or I-head engine, is a type of piston engine that places the camshaft within the cylinder block , and uses pushrods or rods to actuate rocker arms above the cylinder...
  
   Pushrod
• Horsepower: 55 bhp @ 6000 RPM
• Torque: 57 lbft @ 3200 RPM

EA-53

The Subaru EA-53 was used in the 1967 Subaru 1000 Sports Sedan, sold in Japan. It used twin carburetors. This engine was used in the September 1968 Japan Alpine Rally which the car won in the 1000cc engine class.

Specifications

• Displacement: 977.2 cc
• Bore: 72 mm
• Stroke: 60 mm
• Compression Ratio: 10:1
• Valvetrain: OHV
  Overhead valve
  An overhead valve engine, also informally called pushrod engine or I-head engine, is a type of piston engine that places the camshaft within the cylinder block , and uses pushrods or rods to actuate rocker arms above the cylinder...
  
   Pushrod
• Horsepower: 67 PS @ 6600 RPM
• Torque: 8.2 kgm @ 4600 RPM

EA-61

The Subaru EA-61 engine was produced from 1969 to 1972. The Japanese-spec Subaru FF-1 Sport Sedan and the FF-1 Super Touring sedan used twin carburetors, with the engine designation EA-61S.

Specifications

• Displacement: 1088 cc
• Bore: 76 mm
• Stroke: 60 mm
• Compression Ratio: 8.5:1
• Valvetrain: OHV
  Overhead valve
  An overhead valve engine, also informally called pushrod engine or I-head engine, is a type of piston engine that places the camshaft within the cylinder block , and uses pushrods or rods to actuate rocker arms above the cylinder...
  
   Pushrod
• Horsepower: 61 bhp @ 5600 RPM
• Torque: 65 lbft @ 4000 RPM

EA-62

The Subaru EA-62 engine was produced from 1971 to 1972. It is the only EA- engine with rear-facing exhaust ports.

Specifications

• Displacement: 1267.5 cc
• Bore: 82 mm
• Stroke: 60 mm
• Compression Ratio: 9.0:1
• Valvetrain: OHV
  Overhead valve
  An overhead valve engine, also informally called pushrod engine or I-head engine, is a type of piston engine that places the camshaft within the cylinder block , and uses pushrods or rods to actuate rocker arms above the cylinder...
  
   Pushrod
• Horsepower: 80 bhp @ 6400 RPM
• Torque: 73 lbft @ 4000 RPM

EA-62S

This engine used twin carburetors from Zenith-Stromberg.

• Displacement: 1267.5 cc
• Bore: 82 mm
• Stroke: 60 mm
• Compression Ratio: 10.0:1
• Valvetrain: OHV
  Overhead valve
  An overhead valve engine, also informally called pushrod engine or I-head engine, is a type of piston engine that places the camshaft within the cylinder block , and uses pushrods or rods to actuate rocker arms above the cylinder...
  
   Pushrod
• Horsepower: 93 PS @ 7000 RPM
• Torque: 10.5 kgm @ 5000 RPM

Found on

• Subaru FF-1 1300G Sports Sedan and Super Touring (Japan)

Specifications

• Displacement: 1361 cc
• Bore: 85 mm
• Stroke: 60 mm
• Compression Ratio: 8.5:1
• Valvetrain: OHV
  Overhead valve
  An overhead valve engine, also informally called pushrod engine or I-head engine, is a type of piston engine that places the camshaft within the cylinder block , and uses pushrods or rods to actuate rocker arms above the cylinder...
  
   Pushrod
• Horsepower: 58 bhp @ 5200 RPM
• Torque: 68 lbft @ 2400 RPM

Specifications

• Displacement: 1298 cc
• Bore: 83 mm
• Stroke: 60 mm
• Compression Ratio: 9.0:1
• Valvetrain: OHV
  Overhead valve
  An overhead valve engine, also informally called pushrod engine or I-head engine, is a type of piston engine that places the camshaft within the cylinder block , and uses pushrods or rods to actuate rocker arms above the cylinder...
  
   Pushrod
• Horsepower: 65 bhp @ 5600 RPM
• Torque: 85 lbft @ 3200 RPM

EA-71

The Subaru EA-71 engine was produced from 1976 to 1987, and was a redesign of the EA-63 block.

Specifications

• Displacement: 1595 cc
• Bore: 92 mm
• Stroke: 60 mm
• Compression Ratio: 9.0:1
• Valvetrain: OHV
  Overhead valve
  An overhead valve engine, also informally called pushrod engine or I-head engine, is a type of piston engine that places the camshaft within the cylinder block , and uses pushrods or rods to actuate rocker arms above the cylinder...
  
   Pushrod
• Horsepower:
  1976-1979: 67 bhp @ 5200 RPM
  1980-1987: 68 bhp @ 4800 RPM
• Torque:
  1976-1979: 81 lbft @ 2400 RPM
  1980-1987:84 lbft @ 2800 RPM

EA-72 Concept Engine

There was an unreleased EA-72 concept

Concept

The word concept is used in ordinary language as well as in almost all academic disciplines. Particularly in philosophy, psychology and cognitive sciences the term is much used and much discussed. WordNet defines concept: "conception, construct ". However, the meaning of the term concept is much...

 engine

Engine

An engine or motor is a machine designed to convert energy into useful mechanical motion. Heat engines, including internal combustion engines and external combustion engines burn a fuel to create heat which is then used to create motion...

 Subaru

Subaru

; is the automobile manufacturing division of Japanese transportation conglomerate Fuji Heavy Industries .Subaru is internationally known for their use of the boxer engine layout popularized in cars by the Volkswagen Beetle and Porsche 911, in most of their vehicles above 1500 cc as well as...

 developed for use in the Japanese Market in 1989. It was essentially an EA-82 with an EA-71 crankshaft

Crankshaft

The crankshaft, sometimes casually abbreviated to crank, is the part of an engine which translates reciprocating linear piston motion into rotation...

. This engine

Engine

An engine or motor is a machine designed to convert energy into useful mechanical motion. Heat engines, including internal combustion engines and external combustion engines burn a fuel to create heat which is then used to create motion...

 never came about as the Subaru EJ15 and EJ16 were already in development for this purpose.

Specifications

• Displacement: 1595 cc
• Bore: 92 mm
• Stroke: 60 mm
• Compression Ratio: 8.7:1
• Valvetrain: SOHC
• Horsepower: unreleased
• Torque: unreleased

EA-81

The Subaru EA-81 engine was produced from 1980 to 1989 and is a stroked version of the EA-71.

Specifications

• Displacement: 1781 cc
• Bore: 92 mm
• Stroke: 67 mm
• Compression Ratio: 8.7:1
• Valvetrain: OHV
  Overhead valve
  An overhead valve engine, also informally called pushrod engine or I-head engine, is a type of piston engine that places the camshaft within the cylinder block , and uses pushrods or rods to actuate rocker arms above the cylinder...
  
   Pushrod
• Horsepower: 73 bhp @ 4800 RPM
• Torque: 94 lbft @ 2400 RPM

EA-81T

The EA-81T is not an official engine designation from Subaru. The T is used informally to refer to the turbo-supercharger configuration of EA-81 engines that are equipped with a turbocharger

Turbocharger

A turbocharger, or turbo , from the Greek "τύρβη" is a centrifugal compressor powered by a turbine that is driven by an engine's exhaust gases. Its benefit lies with the compressor increasing the mass of air entering the engine , thereby resulting in greater performance...

 and multi port fuel injection

Fuel injection

Fuel injection is a system for admitting fuel into an internal combustion engine. It has become the primary fuel delivery system used in automotive petrol engines, having almost completely replaced carburetors in the late 1980s....

.

Additional Specifications

• Compression Ratio: 7.7:1
• Supercharging Pressure: 7 psi
• Valvetrain: OHV
  Overhead valve
  An overhead valve engine, also informally called pushrod engine or I-head engine, is a type of piston engine that places the camshaft within the cylinder block , and uses pushrods or rods to actuate rocker arms above the cylinder...
  
   Pushrod
• Horsepower: 95 bhp @ 4200 RPM
• Torque: 123 lbft @ 2800 RPM

EA-82

The Subaru EA-82 engine was produced from 1985 to 1994. It came with a carburetor

Carburetor

A carburetor , carburettor, or carburetter is a device that blends air and fuel for an internal combustion engine. It is sometimes shortened to carb in North America and the United Kingdom....

, single point fuel injection

Fuel injection

Fuel injection is a system for admitting fuel into an internal combustion engine. It has become the primary fuel delivery system used in automotive petrol engines, having almost completely replaced carburetors in the late 1980s....

, or multi port fuel injection

Fuel injection

Fuel injection is a system for admitting fuel into an internal combustion engine. It has become the primary fuel delivery system used in automotive petrol engines, having almost completely replaced carburetors in the late 1980s....

. Most of the technical advancements introduced to the EA82 were utilized in the Subaru EJ engine

Subaru EJ engine

The Subaru EJ engine is a series of automotive engines manufactured by Subaru and introduced in 1989, intended to succeed the previous Subaru EA engine. The EJ series is the mainstay of Subaru's engine line, with all engines of this series being 16-valve flat-4 horizontal, with configurations...

, specifically, the SOHC valvetrain, and multi-point fuel injection.

Specifications

• Displacement: 1781 cc
• Bore: 92 mm
• Stroke: 67 mm
• Compression Ratio: 8.7:1 or 9.0:1 SPFI According to Subaru Factory Service manuals: 9.0:1 "carb" 9.5:1 SPFI
• Valvetrain: SOHC
• Horsepower:
  Carb - 84 bhp @ 5200 RPM,
  SPFI - 90 bhp @ 5600 RPM
  MPFI - 97 bhp @ 5200 RPM
• Torque:
  Carb - 101 lbft @ 3200 RPM
  SPFI - 101 lbft @ 3200 RPM
  MPFI - 103 lbft @ 3200 RPM

EA-82T

The EA-82T engine was introduced in 1985 for the GL-10 models, and later on RX Coupe models. It is an MPFI EA-82 with modified cylinder heads and lower compression pistons.

Additional Specifications

• Turbo: IHI Corporation
  IHI
  The acronym IHI can refer to:* Ishikawajima-Harima Heavy Industries, a Japanese company which produces ships, aero-engines, and other transport-related machinery* Information Holdings Inc., part of The Thomson Corporation since 2004...
  
   model RHB5 VF7
• Compression Ratio: 7.7:1
• Supercharging Pressure: 7 psi
• Horsepower:
  111 bhp @ 5200 RPM (1985–1986)
  115 bhp @ 5200 RPM (1987–1990)
• Torque: 134 lbft @ 2800 RPM