What is the engine model of the Subaru Impreza?
2 Answers
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.
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.
