The EN series engine is used for kei cars sold by Subaru 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. 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 that was used in the Subaru Justy, 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.[1]
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 The first engine. Naturally Aspirated Carburetor is variable, EMPi is equipped with a supercharger. Inside diameter × stroke is over-square.
Installed in the Vivio Van.
The engine is installed in the early Sambar. Compression ratio dropped slightly, and setting a low-fat rotation torque.
Used in
Subaru Sambar
Subaru Sambar Dias
Specifications EN07A engine carburetor engine became EMPi.
Used in
Subaru Rex
Subaru Vivio
Subaru Pleo
Specifications EN07C engine carburetor engine became EMPi. The rocker cover on the delivery service version had a crimson ceramic coating.
Was installed in the Pleo Van EGI SPI (single point injection) engine design.
Subaru Pleo
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.
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.
Subaru Pleo L (CVT transmission)
EMPi EN07W become the engine fitted with a small inter-cooler type of preamble. The L-type Subaru Pleo late in the generation.
Subaru Pleo L (CVT transmission)
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.
Used in
Subaru Rex VX
Subaru Vivio GX
Subaru Pleo RM
R2 was used from its debut, the version with variable valve timing DOHC head. The ignition system is used direct ignition.
Used in
Subaru R2
Subaru R1
Subaru Stella
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.
Used in
Subaru Vivio RX-R
Subaru Pleo RS
Subaru R2
Subaru R1
Subaru Stella
The Subaru Fiori 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.