The EN series engine is used for kei cars sold 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...

 in Japan. It is a four-cylinder, four-cycle engine introduced in 1988 as a replacement for the EK23 that was used in the Subaru Rex

Subaru Rex

The Subaru Rex, also known as Ace, Viki, Sherpa, 500/600/700, Mini Jumbo or M60/M70/M80 in various export markets, is a kei class automobile produced from 1972 to 1992 mainly for sale in Japan by Subaru, although it was also sold in Europe, South America, and the Caribbean...

. While others manufacturers adopted a three-cylinder engine, the Subaru-EN is a four-cylinder. The EN05 547 cc 4-cylinder engine block and the cylinder was based on the EK23. Subaru did make a three-cylinder engine, called the Subaru EF engine

Subaru EF engine

The EF is an automotive engine made by Subaru, introduced in 1984 for the Subaru Justy.It is a water-cooled straight-3 four-stroke engine with a belt-driven single overhead camshaft, and a chain-driven balance shaft...

 that was used in the Subaru Justy

Subaru Justy

The Subaru Justy is a subcompact hatchback that has been sold by Japanese automobile manufacturer Subaru since 1984. From 1984–1994 Subaru manufactured the Justy itself; since then it has sold a rebadged version of other vehicles under the Justy nameplate...

, but the EF engine is no longer in production.

The following year, 1989, the Japanese Ministry of Transport revised the standards for kei cars. This resulted in the new 660 cc class series of four-cylinder engines, and the EN05 had its stroke increase to produce the EN07. The increase stroke helps make up for the lack of low-speed torque-cylinder engine, which is the weakness of the other four-cylinder 660 cc engines. While 4-cylinder engines are not the typical engine in kei class cars, Subaru still primarily uses 4-cylinder engines. During the 20 years of kei car development, the two- and three-cylinder engines have improved to be on par with Subaru's four-cylinder designs.

There was a turbocharged version, the EK23, used in the Subaru Rex, which competed with the Daihatsu Mira and Suzuki Alto. This was replaced with a supercharger. The EN-engine turbo version is not present in the following list, only the naturally aspirated and supercharged versions. The supercharged engine was nicknamed "Clover", and Subaru now engraved the head with the clover leaf mark .

EN05

EN05
The first engine. Naturally Aspirated Carburetor is variable, EMPi is equipped with a supercharger. Inside diameter × stroke is over-square.

• SOHC 8-valve
• Displacement: 547 cc
• Inside diameter × stroke: 56.0 × 55.6 mm
• Compression ratio: 10.0 (Naturally Aspirated carburetor) / 8.5 (supercharger)
• Specifications: Naturally Aspirated carburetor 38PS / 7,500 rpm 4.5 kg m / 4,500 rpm (KH2 1986 Subaru Rex
  Subaru Rex
  The Subaru Rex, also known as Ace, Viki, Sherpa, 500/600/700, Mini Jumbo or M60/M70/M80 in various export markets, is a kei class automobile produced from 1972 to 1992 mainly for sale in Japan by Subaru, although it was also sold in Europe, South America, and the Caribbean...
  
  )
• Specifications: supercharger 61PS / 6,400 rpm 7.6 kg m / 4,400 rpm (KH2 1986 Subaru Rex
  Subaru Rex
  The Subaru Rex, also known as Ace, Viki, Sherpa, 500/600/700, Mini Jumbo or M60/M70/M80 in various export markets, is a kei class automobile produced from 1972 to 1992 mainly for sale in Japan by Subaru, although it was also sold in Europe, South America, and the Caribbean...
  
  )

EN07A (Naturally Aspirated carburetor)

Installed in the Vivio Van

Subaru Vivio

The Subaru Vivio is a kei car that was introduced in March 1992, and manufactured by Subaru until October 1998. It has a 658 cc multi-point fuel-injected four-cylinder engine , which is small enough to place it in the light car class, giving its owners large tax breaks in Japan...

.

• SOHC 8-valve
• Displacement: 658 cc
• Inside diameter × stroke: 56.0 × 66.8 mm
• Compression ratio: 10.0
• Specification Reference: 42PS / 7,000 rpm 5.3 kg m / 4,500 rpm (KW series Subaru Vivio
  Subaru Vivio
  The Subaru Vivio is a kei car that was introduced in March 1992, and manufactured by Subaru until October 1998. It has a 658 cc multi-point fuel-injected four-cylinder engine , which is small enough to place it in the light car class, giving its owners large tax breaks in Japan...
  
  )

EN07C (Naturally Aspirated carburetor)

The engine is installed in the early Sambar. Compression ratio dropped slightly, and setting a low-fat rotation torque.

• SOHC 8-valve
• Displacement: 658 cc
• Inside diameter × stroke: 56.0 × 66.8 mm
• Compression ratio: 9.8
• Specification Reference: 40PS / 6,500 rpm 5.5 kg m / 3,500 rpm (KV3 series Sambar)

EN07L (LPG carburettor version)

• SOHC 8-valve
• Displacement: 658 cc
• Inside diameter × stroke: 56.0 × 66.8 mm
• Compression ratio: 9.8

Used in

Subaru Sambar

Subaru Sambar Dias

EN07E (Naturally Aspirated EMPi)

Specifications EN07A engine carburetor engine became EMPi.

• SOHC 8-valve
• Displacement: 658 cc
• Inside diameter × stroke: 56.0 × 66.8 mm
• Compression ratio: 10.0
• Specification Reference: 38 kW (53PS; 52 hp) / 7200 rpm 53.9Nm (5.5 kg m) / 5600 rpm (KK3 VIVIO MT version)

Used in

Subaru Rex

Subaru Vivio

Subaru Pleo

EN07F (Naturally Aspirated EMPi)

Specifications EN07C engine carburetor engine became EMPi. The rocker cover on the delivery service version had a crimson ceramic coating.

• SOHC 8-valve
• Displacement: 658 cc
• Inside diameter × stroke: 56.0 × 66.8 mm
• Compression ratio: 9.8
• Specification Reference: 35 kW (48PS) / 6,400 rpm 58N m (5.9 kg m) / 3,200 rpm (TV1 series Sambar)

EN07S (Naturally Aspirated SPI)

Was installed in the Pleo Van EGI SPI (single point injection) engine design.

• SOHC 8-valve
• Displacement: 658 cc
• Inside diameter × stroke: 56.0 × 66.8 mm
• Compression ratio: 10.0
• Specification Reference: 45PS / 6,400 rpm 5.7 kg m / 4,000 rpm

Subaru Pleo

EN07Y (supercharger EMPi)

The Rear engine/Rear drive version initially installed in the Sambar used a distributor, but a distributorless ignition was used from 1996 on. Like the EN07F, the high durability version used in the delivery-service version has a rocker cover decorated with a crimson ceramic coating.

• SOHC 8-valve supercharger
• Displacement: 658 cc
• Inside diameter × stroke: 56.0 × 66.8 mm
• Compression ratio: 8.3
• Specification Reference: 55ps / 6,200 rpm 7.1 kg m / 3,800 rpm (KV4 series Sambar Touring)

43 kW (58PS) / 6,000 rpm 74N m (7.5 kg m) / 4,400 rpm (TV1 series Sambar Dias)

EN07W (minor change SPI)

Equipped with a CVT for Pleo, "mild change" engine power and fuel economy with both a supercharger combination of low pressure called previously. No coolers SPI interface specification.

• SOHC 8-valve supercharger
• Displacement: 658 cc
• Inside diameter × stroke: 56.0 × 66.8 mm
• Compression ratio: 8.9
• Specification Reference: 42 kW (58PS) / 6,400 rpm 74N m (7.3 kg m) / 4,000 rpm

Subaru Pleo L (CVT transmission)

EN07U (mild change EMPi)

EMPi EN07W become the engine fitted with a small inter-cooler type of preamble. The L-type Subaru Pleo late in the generation.

• SOHC 8-valve supercharger inter-cooler (mild change)
• Displacement: 658 cc
• Inside diameter × stroke: 56.0 × 66.8 mm
• Compression ratio: 8.9
• Specification Reference:: 44 kW (60PS) / 6,400 rpm 75N m (7.6 kg m) / 4,000 rpm

Subaru Pleo L (CVT transmission)

EN07Z (IC supercharger with EMPi)

EN exists from the time of Rex's hot model to represent the type of RM is Subaru Pleo fuel injection MPI EMPi is changing from being resetting to get power from the low rotation.

• SOHC 8-valve supercharger intercooler
• Displacement: 658 cc
• Inside diameter × stroke: 56.0 × 66.8 mm
• Compression ratio: 8.5
• Specification Reference: 47 kW (64PS) / 6,400 rpm 84N m (8.6 kg m) / 4,400 rpm (Subaru Rex VX / Subaru Vivio GX)

64PS / 6,000 rpm 9.1 kg m / 3,600 rpm (Subaru Pleo RM)

Used in

Subaru Rex VX

Subaru Vivio GX

Subaru Pleo RM

EN07D (DOHC AVCS)

R2 was used from its debut, the version with variable valve timing DOHC head. The ignition system is used direct ignition.

• DOHC 16-valve AVCS
• Displacement: 658 cc
• Inside diameter × stroke: 56.0 × 66.8 mm
• Specification Reference: 40 kW (54PS) / 6,400 rpm 63N m (6.4 kg m) / 4,400 rpm (R1, R2, Stella)

Used in

Subaru R2

Subaru R2

For the late 1960s Subaru R-2, please see Subaru R-2The Subaru R2 was announced in Japan on December 8, 2003, and the R2 name was inspired by the Subaru R-2, the kei car model that was produced between 1969 and 1972....

 

Subaru R1

Subaru R1

The Subaru R1 was introduced by the Japanese carmaker Subaru on January 4, 2005. It was designed to fit within the Japanese kei car tax bracket.The R1 is a two-door version of the Subaru R2, but with a shorter body and wheelbase...

 

Subaru Stella

Subaru Stella

The Subaru Stella is a Japanese automobile produced by Subaru starting June 2006. The Stella is based on the same architecture as the Subaru R2...

EN07X (DOHC IC with supercharger)

VIVIO RX-R was developed at the time appeared DOHC head design. SOHC valve rocker arm to drive change, and adopt the direct push. High Lift Cam like Toyota, only the timing belt drives the exhaust camshaft, the method of driving the intake cam in syncronous from there. This, 660 cc DOHC because of the often large pincer valve angle and engine that aims to compact combustion chamber by the narrow-angle slightly. Was first launched, the regular gasoline version, the RX-R Spec Subaru Vivio high-octane gasoline from the final form, appeared at the back of Stella has once again returned to the regular version. Channel is changed when appearance of the cylinder head Subaru Pleo, farthest away from the radiator was hit by an anti-heat damage to the cylinder.

• Supercharger inter-cooler with a DOHC 16 Valve
• Displacement: 658 cc
• Inside diameter × stroke: 56.0 × 66.8 mm
• Compression ratio: 9.0
• Specification Reference: 47 kW (64PS) / 7,200 rpm 106N m (9.0 kg m) / 4,000 rpm (Subaru Vivio RX-R)

47 kW (64PS) / 6,000 rpm 102N m (10.5 kg m) / 3,200 rpm (Subaru Pleo RS)

Used in

Subaru Vivio RX-R

Subaru Pleo RS

Subaru R2

Subaru R2

For the late 1960s Subaru R-2, please see Subaru R-2The Subaru R2 was announced in Japan on December 8, 2003, and the R2 name was inspired by the Subaru R-2, the kei car model that was produced between 1969 and 1972....

 

Subaru R1

Subaru R1

The Subaru R1 was introduced by the Japanese carmaker Subaru on January 4, 2005. It was designed to fit within the Japanese kei car tax bracket.The R1 is a two-door version of the Subaru R2, but with a shorter body and wheelbase...

 

Subaru Stella

Subaru Stella

The Subaru Stella is a Japanese automobile produced by Subaru starting June 2006. The Stella is based on the same architecture as the Subaru R2...

EN08

The Subaru Fiori

Subaru Rex

The Subaru Rex, also known as Ace, Viki, Sherpa, 500/600/700, Mini Jumbo or M60/M70/M80 in various export markets, is a kei class automobile produced from 1972 to 1992 mainly for sale in Japan by Subaru, although it was also sold in Europe, South America, and the Caribbean...

derivative was also equipped with pink and blue pinstriping from factory and a 2 year, 50,000k warranty was offered when new. Equipped with a different engine, the Fiori had Subaru's 758 cc carburetted 4-cylinder EN08 powerplant.