Is an EJ25 an STi engine?
No, the EJ25 engine is not the same as the STi engine. The EJ25 is a 2.5-liter boxer engine produced by Subaru, while the STi engine refers to a high-performance version of Subaru's engines, typically used in their top-of-the-line Impreza STi models.
Explaining the Difference Between the EJ25 and STi Engines
The EJ25 is a naturally aspirated 2.5-liter boxer engine that has been used in various Subaru models, including the Impreza, Legacy, and Outback. It is known for its reliability and decent power output, but it is not considered a high-performance engine. In contrast, the STi engine is a turbocharged version of Subaru's engines, designed to deliver significantly more power and performance.
The key differences between the EJ25 and STi engines are:
- Displacement: The EJ25 is a 2.5-liter engine, while the STi engines can have displacements ranging from 2.0 to 2.5 liters, depending on the specific model.
- Forced Induction: The STi engines are turbocharged, which allows them to produce significantly more power than the naturally aspirated EJ25.
- Performance: The STi engines are designed for high-performance applications and can produce over 300 horsepower, while the EJ25 is more focused on reliability and everyday drivability, with power outputs typically in the range of 150-200 horsepower.
- Applications: The EJ25 is used in a wide range of Subaru models, while the STi engines are primarily found in the top-of-the-line Impreza STi models, which are known for their exceptional performance and handling.
In summary, while both the EJ25 and STi engines are produced by Subaru, they are designed for different purposes and have significant differences in terms of displacement, forced induction, performance, and applications.
What does STi stand for?
Sexually transmitted infections (STIs), or sexually transmitted diseases (STDs), are infections that are passed from one person to another through sexual contact. They are usually spread during vaginal, oral, or anal sex.
Are WRX and STI the same engine?
However, the WRX has neither the same motor, or drivetrain and differentials as the STi. The STi receives a 2.5l turbocharged flat four making ~300 horsepower at the crank while the WRX historically has received a 2.0l turbocharged flat four making between 227 and 268 horsepower at the crank.
How much HP can a EJ25 handle?
300 whp:The EJ20/EJ25 engines can handle 300 whp maximum with stock internals with no further modifications other than a proper fuel management tune. 400 whp:We suggest a set of forged AMR pistons and billet rods to safely boost up the engine.
What engine is in an STI?
| Subaru WRX STI | |
|---|---|
| Related | Subaru WRX |
| Powertrain | |
| Engine | Petrol: 2.0 L EJ207 H4-T (JDM) 2.5 L EJ257 H4-T (export) |
| Transmission | 6-speed TY85 manual |
What makes a Subaru an STI?
These letters stand for Subaru Tecnica international, which is essentially a name to describe Subaru's own motorsports program.
What's the difference between EJ25 and EJ257?
In the US, the only car that has an engine designated as an EJ257 is the STI. All of the other 2.5 liter turbo EJ series engines are designated EJ255.
Is an STI still a WRX?
At the launch of the current WRX in 2022, the car maker announced Subaru Technica International (STI) would not be producing a high-performance version of the WRX – with the department instead shifting its focus to electric cars. Subaru then trademarked the STe badge in 2023.
What is the weakness of the EJ25?
No engine is perfect, and the EJ25 is no exception. Some common issues that EJ25 owners have reported include head gasket failures, ringland failures, oil consumption issues, and timing belt and water pump failures.
What is the difference between a STD and a STI?
A sexually transmitted infection (STI) is a virus, bacteria, fungus, or parasite people can get through sexual contact. A sexually transmitted disease (STD) develops because of an STI and the term implies that the infection has led to some symptom of disease. People sometimes use the terms in one another's place.
When did Subaru stop using the EJ25?
Subaru's flagship model the WRX and STI have all been powered by this engine series until 2015 when the WRX name dropped the EJ25 and added a BRZ variant of Subaru's new motor the FA series.
