What is the engine model of the Subaru Impreza?

[OLucas]

Subaru Impreza uses the EJ25 engine model, with a maximum horsepower of 300 HP, a maximum power output of 221 KW, a maximum power speed of 6000 rpm, and a peak torque of 407 N.m. The engine of the Subaru Impreza is a 2.5-liter turbocharged four-cylinder horizontally opposed engine from Subaru. For daily maintenance of the Subaru Impreza's engine, the following methods can be used: Use lubricating oil of appropriate quality grade. For gasoline engines, SD--SF grade gasoline engine oil should be selected based on the additional equipment of the intake and exhaust systems and usage conditions; for diesel engines, CB_CD grade diesel engine oil should be selected according to the mechanical load, with the selection standard not lower than the manufacturer's requirements. Regularly change the engine oil and filter. The quality of any grade of lubricating oil will change during use. After a certain mileage, the performance deteriorates, leading to various engine problems. To avoid failures, change the oil regularly according to usage conditions and maintain an appropriate oil level. When the oil passes through the fine holes of the filter, solid particles and viscous substances in the oil accumulate in the filter. If the filter is clogged and the oil cannot pass through the filter element, it may burst the filter element or open the safety valve, bypassing the filter and bringing contaminants back to the lubrication area, accelerating engine wear and increasing internal pollution. Regularly clean the crankcase. During engine operation, high-pressure unburned gases, acids, moisture, sulfur, and nitrogen oxides from the combustion chamber enter the crankcase through the gap between the piston rings and cylinder walls, mixing with metal powder from component wear to form sludge. A small amount remains suspended in the oil, while a large amount precipitates, clogging filters and oil holes, making engine lubrication difficult and causing wear. Regularly use radiator cleaner to clean the radiator. Removing rust and scale not only ensures the engine operates properly but also extends the overall lifespan of the radiator and engine.

[Connie]

I know the Subaru Impreza like the back of my hand, and the engine model depends on the specific year. The most iconic engine in the older STi models is undoubtedly the EJ20 series—that horizontally opposed engine's roar gives me goosebumps every time. I felt it deeply when driving my friend's 2005 WRX; the EJ205 paired with a turbocharger delivered an exhilarating kick. After the 2015 redesign, it switched to the FA20 series, which lost some of the raw aggression of the older models but significantly improved smoothness. The latest models now use the FA24, a 2.4L turbo with a larger displacement yet better fuel efficiency. If you're buying a used Impreza, pay attention: models from 2001-2007 mostly have the EJ207, while post-2011 models transitioned to the FA series, offering a completely different driving experience.

[StBrandon]

Modification enthusiasts all know that the soul of the Impreza lies in its engine, and the specific model depends on the configuration. The standard version uses a naturally aspirated engine like the EJ253, which delivers smooth driving but lacks punch. The real thrill comes with the WRX STi version—the Japanese domestic market favors the EJ207 "red top" engine, where hitting 8000 RPM and feeling the TEC kick in is pure exhilaration. The US-spec models are more conservative, using the EJ257 with higher torque, making it better suited for street driving. The newer WRX now features the FA24F engine, which reduces turbo lag, but veteran enthusiasts still miss the raw mechanical feel of the EJ series. In terms of tuning potential, a reinforced EJ20 can push 500 horsepower, but for daily driving, it's best not to over-modify, as it can easily damage the car.

[KendraLee]

The Subaru Impreza's engines primarily consist of two major series: the classic EJ and the modern FA. The first five generations exclusively used EJ series engines, such as the legendary EJ20G turbo in the initial GC8 model. Post-2008 GR/GV models began mixing the naturally aspirated EJ253 and the turbocharged EJ255. The 2014 model year marked a turning point, with the FA20DIT replacing the EJ series, featuring more advanced direct injection technology. The latest GD platform now utilizes the FA24F, a 2.4-liter engine paired with a CVT transmission—while it lacks the fun of a manual, it's well-suited for city commuting. For used car buyers, it's advisable to check the VIN to confirm the engine model, as the EJ series is known for oil consumption issues at high mileage.

[AlexFitz]

Following the Impreza engine models for over a decade, its evolution is a history of technological upgrades. The EJ20 series gained fame in the 1990s, with its horizontally opposed design delivering an ultra-low center of gravity. The EJ205 introduced to China in 2004 was easy to modify, but its cooling system was a weak point. The EJ257 in 2009 addressed the heat dissipation issues. What surprises me most about the current FA24 engine is its fuel efficiency, achieving just 7L/100km on highway cruising. There are significant differences between versions: the US-spec WRX uses the FA24F, the Japanese-spec STi S4 employs the CB18 hybrid, and the European market even has a 1.6L small-displacement variant. Pay special attention when choosing a car, as the China-spec models have more conservative tuning.

[PeterAnn]

When it comes to Subaru Impreza engines, I always think of the unique vibration from the horizontally opposed design. The legendary EJ207 is hailed as a masterpiece by enthusiasts, with its radical 9,000 rpm redline. For daily driving, the FA20 is more suitable, thanks to its dual injection technology that eliminates cold start shakes. Recently test-drove the new WRX - the FA24 engine's torque surge at 3,000 rpm makes it perfect for mountain roads. EJ series owners should watch for head gasket leaks, while FA engines require attention to direct injection carbon buildup. For performance purists, the 2007 STi version with DCCD is the holy grail - the EJ207 paired with full-time AWD delivers rock-solid cornering.