Unlike the SOHC EJ22 it shared some dimensions with, the EG33 featured dual overhead cams both engines used four valves per cylinder. Īfter the SVX was discontinued, Subaru did not offer a six-cylinder engine until the EZ30 was developed and released for the Subaru Outback. The EG33 was exclusively fitted to the Alcyone SVX, where it was paired with the 4EAT automatic transmission in both front- and all-wheel-drive configurations. Similar to how the six-cylinder ER27 is related to the earlier four-cylinder EA82, the EG33 shared bore and stroke dimensions with the contemporary four-cylinder EJ22. īoth JDM and USDM versions of the ER27 used multi-point electronic fuel injection. The valve timing system is belt-drive using two individual timing belts, curiously one belt uses a spring tensioner (like the EA82) whilst the other uses a hydraulic tensioner (like the EJ22). The upper intake manifold then bolts to the lower section and is unlike the EA82 or EJ22 "spider" manifold designs in that there is no central plenum chamber. The intake manifold uses a two piece design with a lower section bolting to the heads containing the coolant bridge, injectors and various vacuum lines. For instance, the oil and water pumps are unique to the ER27, sharing similar bolt patterns and design to the EA82, but being of a higher flow in both cases. While recognised as bearing many similarities to the Subaru EA82 engine, there are numerous differences in design between the two engines and a large portion of parts are unique to the ER27. Like the EA series engines, the ER27 engine featured 2-valve cylinder heads with hydraulic lash adjusters and the ER27 and EA engines shared the same bore, stroke, and spacing. The ER27 designation was the first time Subaru incorporated the engine's displacement into the engine designation and all subsequent engine codes have retained this nomenclature. When the ER27 was introduced, it was the only water-cooled flat-6 automobile engine on the market. Subaru's hybrid diesel powertrain was also imagined in cars like the 2014 VIZIV-2 Concept, the 2015 VIZIV Future Concept, and the VIZIV-7 three-row SUV Concept.Reciprocating internal combustion engine Subaru ER27Ĭreated as a refined luxury engine with improved power over the EA82T, Subaru introduced the ER27 engine in November 1985 for the Subaru ACX-II concept car, shown at the Tokyo Motor Show and billed as the 'concept car of the near future.' The concept went into production as the Subaru Alcyone VX (Subaru XT6 in North America) in August 1987, the exclusive application for the ER27. The VIZIV SUV concept was Subaru's vision of an off-road-ready, family-friendly, and highly efficient diesel-powered future crossover. The gearbox worked in perfect harmony with the famed Subaru Symmetrical AWD system. The gearbox of choice is Subaru's Lineartronic (CVT) gearbox, which is attached to the front axle motor. It uses the 2.0-liter EE20 boxer diesel engine with three electric motors (one for the front axle and two for the rear). The 2013 VIZIV SUV concept was envisioned as a plug-in hybrid model. The 2017 Subaru VIZIV Performance Concept also rekindled our hope of an all-new Impreza WRX STi.īut the most ambitious part of the VIZIV concepts that many missed was Subaru's idea of plinking in a hybrid diesel powertrain. It started with the sleek-looking VIZIV SUV Concept shown above and ended with the 2019 VIZIV Adrenaline Concept that looked like a Subaru Crosstrek from the future. The VIZIV Concepts were a series of futuristic Subarus showcased from 2013 through 2019. We also give you an insight into Subura's now-shelved plan for a hybrid EE20 diesel powertrain. More specifically, about its reliability, problems, and why it wasn't necessarily a masterstroke from the folks at Subaru. Updated August 2023: We have updated this article with more Subaru EE20 diesel boxer engine trivia. Earlier EE20s, however, do not fall in that category. Admittedly, in Subaru's defense, some engines have surpassed hundreds of thousands of miles with just basic maintenance and no serious fettling. As is popular with many Subaru engines, reliability isn't their forte, and the EE20 was no exception. However, the boxer engine wasn't particularly robust. Subaru also had grand plans for its diesel boxer engine as a 2013 concept came with a hybrid version of the EE20 boxer engine. Per the announcement in Geneva, the EE20 was sold initially in the Subaru Legacy (wagon and sedan) and the Subaru Outback for the European market. Subaru unveiled the world's first boxer diesel engine at the 2007 Geneva Auto Show.
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