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What is the difference between the Subaru 2.5 L and the 2.5 i?

The Subaru 2.5 L and 2.5 i are two engine options offered in various Subaru models, but they differ in their performance characteristics and features. In this article, we'll explore the key differences between these two engine configurations to help you understand which one might be the better fit for your driving needs.


Engine Displacement and Power Output


The primary difference between the Subaru 2.5 L and 2.5 i engines is their displacement. The 2.5 L engine has a larger displacement of 2.5 liters, while the 2.5 i engine has a displacement of 2.5 liters as well. The 2.5 L engine typically produces more horsepower and torque than the 2.5 i engine, resulting in better acceleration and overall performance.


Fuel Efficiency


Due to the larger displacement and higher power output, the Subaru 2.5 L engine generally has slightly lower fuel efficiency compared to the 2.5 i engine. The 2.5 i engine is designed to be more fuel-efficient, making it a better choice for drivers who prioritize fuel economy over raw power.


Engine Technology


The Subaru 2.5 L engine is often found in higher-trim models or performance-oriented variants, while the 2.5 i engine is more commonly used in more affordable, entry-level trims. The 2.5 L engine may feature more advanced technologies, such as direct fuel injection or turbocharging, which can further enhance its performance capabilities.


Applications and Availability


The Subaru 2.5 L and 2.5 i engines are both widely used in various Subaru models, including the Outback, Ascent, Forester, and Impreza. The specific engine option available will depend on the trim level and model year of the vehicle you're considering.


In summary, the Subaru 2.5 L engine offers more power and performance, while the 2.5 i engine prioritizes fuel efficiency. The choice between the two will depend on your driving preferences and the specific Subaru model you're interested in.

Does S mode use more gas?


Does Sport Mode Burn More Gas? By switching to more performance-oriented throttle and transmission settings, your vehicle's engine will rev higher and longer than it would during normal operation. This requires more fuel, and over a long drive, it can negatively impact fuel economy.



What does the i button do in a Subaru?


You see the orange eye displayed up there this is telling you something. Important about the car. Click on that button.



What is the life expectancy of a Subaru 2.5 engine?


200,000 miles
Engine Lifespan: Subaru engines are known for their durability and longevity, with many drivers reporting engines that last well beyond 200,000 miles with proper maintenance. The key to extending the lifespan of your Subaru engine is regular maintenance, including oil changes, fluid checks, and tune-ups.



What is the difference between the Subaru Outback 2.5 I and 2.5 I Limited?


Key differences between the new Subaru Outback 2.5i and the 2.5i Limited are as follows: Dual-zone climate control is standard with the 2.5i Limited, but the 2.5i has manual air conditioning. The 2.5i trim level comes with 17-in.



What does the i mean in 2.5 i?


same.. i is for injection, l is for liters. 2.5i means, 2.5 liters and injection anyway. They're the same engine...



What are the disadvantages of boxer engines?


Boxer Engine Disadvantages

  • Its wide size makes it somewhat more difficult to work on, especially in tight quarters.
  • As a result of its position, maintenance and repairs are usually higher in cost, in part because it takes mechanics longer to do routine work, like changing spark plugs.



Should I drive in S or I mode on my Subaru?


There is no S mode, only Intelligent and Sport Sharp. All it does is change the throttle curve which artificially makes the car feel quicker. Drive in whichever mode you prefer, it makes no difference.



Does Subaru 2.5 turbo engine require premium gas?


However, the engines found in the Subaru BRZ, the Subaru WRX, and the Subaru WRX STI are built for higher compression with a powerful turbocharger -- as a result, regular fuel can be problematic in these engines. Instead, premium gas is required.



Is the 2.5 i Subaru engine turbo?


2.5 liter 4 cyl DOHC turbocharged engine w/ 305 hp and 290 lb-ft torque [STI]



What is the difference between a Subaru 2.5 L and a 2.5 I?


2.5i is essentially a trim level. It implies the 2.5 liter (or 2.5L) naturally aspirated engine is used.


Kevin's Auto

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.