Did Subaru Change Its 2.5 Engine? A Comprehensive Analysis

Subaru has always been known for its reliable and high-performance cars, and the 2.5 engine is one of its most iconic powertrains. Recently, there have been discussions about changes made to the engine, leading many to wonder if Subaru has finally upgraded its legendary 2.5 engine. In this article, we will dive deep into the changes made to the 2.5 engine by Subaru and its impact on performance and driving experience.

What are the Changes Made to the 2.5 Engine?

Yes, Subaru has indeed made changes to its 2.5 engine. The latest version of the engine, now called the FA24, is based on the same platform as the FA20 turbocharged engine used in Subaru’s sports cars.

The FA24 engine features a larger bore and longer stroke, providing a 14% increase in displacement compared to the previous 2.5 engine. The FA24 also has direct fuel injection, which is responsible for better fuel economy and lower emissions. Additionally, the FA24 engine features an intercooled turbocharger, further enhancing the engine’s power output.

Why Did Subaru Make these Changes?

Subaru’s primary goal in making these changes was to increase the engine’s efficiency and performance while also ensuring compliance with global emissions regulations.

The FA24’s larger bore and stroke design, combined with direct fuel injection and an intercooled turbocharger, allowed Subaru to achieve higher power output with better fuel economy and lower emissions. Overall, the new engine is more efficient and powerful than its predecessor.

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Impact on Performance

The new FA24 engine delivers an impressive 182 kW of power and 376 Nm of torque, a significant improvement over the previous generation 2.5 engine. The engine reaches peak torque at a low rpm, providing better acceleration from lower speed ranges. In terms of speed, the new engine powers the Subaru to 100 km/h in just 6.3 seconds, an impressive feat for a mid-size sedan.

The new engine is also more fuel-efficient than the previous generation, providing up to 10% better fuel economy. This is thanks to the direct injection technology and the intercooled turbocharger, which significantly reduces fuel consumption while still providing high power output.

The Overall Driving Experience

The FA24’s increased power output and fuel efficiency translate into a more thrilling and comfortable driving experience. The intercooled turbocharger allows for faster and more responsive acceleration, and the engine’s higher torque ratings guarantee prompt overtaking and confident driving on the highway.

Additionally, the engine is quieter than its predecessor, and the improved suspension and steering ensure that the driving experience is both smooth and precise.

Other Changes Made to the Car

Apart from the engine, Subaru has also made several other improvements to the latest Legacy model. The car now features an 11.6-inch touchscreen display for multimedia and navigation controls, with intuitive options that can be customized to the driver’s preferences.

The car also now has Subaru’s EyeSight driver assist technology, which automatically applies brakes, maintains distance, and keeps the vehicle centered in its lane. Moreover, the EyeSight technology also includes adaptive cruise control and lane departure warnings, making driving safer and less stressful.

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Frequently Asked Questions (FAQs)

What is the main difference between the previous 2.5 engine and the new FA24 engine?

The FA24 engine features a larger bore and stroke, direct fuel injection, and an intercooled turbocharger, providing better fuel economy, lower emissions, and higher power output than the previous 2.5 engine.

Is the new FA24 engine more powerful than the previous 2.5 engine?

Yes, the new engine delivers 182 kW of power and 376 Nm of torque, a significant improvement over the previous 2.5 engine’s performance.

Does the new engine provide better fuel economy than the previous engine?

Yes, the new engine is up to 10% more fuel-efficient than the previous generation, thanks to its direct injection and intercooled turbocharger technology.

Are there other changes made to the latest Legacy model?

Yes, Subaru has also made several other improvements, including an 11.6-inch touchscreen display, EyeSight driver-assist technology, and upgraded suspension and steering.


Subaru’s latest upgrade to the iconic 2.5 engine is a massive leap forward in engine technology. The FA24 engine is more powerful, efficient, and environmentally friendly than its predecessor, all while providing a thrilling and enjoyable driving experience. With the latest upgrades, the Subaru Legacy has become an even more attractive vehicle for car enthusiasts, Subaru enthusiasts, or anyone in the market for a high-performance mid-size sedan.

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Joseph Weaver

With a background in engineering and a passion for cars, Joseph brings a unique perspective to our blog. He's particularly interested in the technology and innovation behind Subaru's advanced safety features, and his articles on this topic are always insightful and informative. When he's not writing, he enjoys playing video games and spending time with his family.

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