Unleashing Power: A Closer Look at Subaru’s Boxer 6 Turbo Engine

Subaru’s Boxer engine design has long been a hallmark of its vehicles, known for its unique horizontally opposed cylinders. But the addition of a turbocharger to the Boxer 6 engine takes it to a whole new level. In this article, we’ll take a closer look at Subaru’s Boxer 6 Turbo engine and explore what makes it so unique.

Understanding the Subaru Boxer Engine Design

First, it’s worth taking a closer look at the Boxer engine design. This engine configuration features horizontally opposed cylinders that lie flat on either side of the crankshaft, rather than a more traditional in-line or V-shaped cylinder arrangement. This makes the engine more compact and lower to the ground, improving handling and stability.

But what does this mean for performance? The Boxer engine is known for its balance and smoothness, as well as its ability to generate plenty of torque. And with the addition of a turbocharger, the engine gains even more power.

What is a Turbocharger?

A turbocharger is a device that forces air into the engine, allowing it to burn more fuel and produce more power. It uses exhaust gas to spin a turbine, which then spins a compressor that pushes more air into the engine. This results in a significant boost in power and torque, making the engine more responsive and capable of reaching higher speeds.

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How Subaru Has Modified the Boxer 6 Engine to Include a Turbocharger

Subaru has modified the Boxer 6 engine to include a turbocharger by adding a low-inertia twin-scroll turbocharger. This is a high-performance turbocharger that allows for quick response and improved driving dynamics. It works by separating the exhaust gas flow into two separate streams that drive the turbocharger turbine, which helps to minimize lag and increase overall performance.

Subaru has also made other modifications to the engine, including a strengthened block and pistons, updated head gaskets, and modified intake and exhaust systems. These changes allow the engine to handle the additional boost provided by the turbocharger and improve overall performance and durability.

Benefits of a Turbocharger in Improving Engine Performance

The addition of a turbocharger to the Boxer 6 engine provides a number of benefits, including increased power output and improved throttle response. The turbocharger allows the engine to produce more power at lower rpm, which makes it more responsive and able to accelerate more quickly. The engine also gains more torque, which improves its ability to pull heavy loads and climb steep hills.

Another benefit of a turbocharger is improved fuel efficiency. By increasing the engine’s power output, the turbocharger allows it to burn fuel more efficiently, reducing fuel consumption and emissions. This makes the engine more environmentally friendly and cost-effective.

How the Boxer 6 Turbo Compares to Other Engines in Its Class

The Boxer 6 Turbo engine is a unique offering that’s unmatched by other engines in its class. Its horizontally opposed cylinder design provides a smoother and more balanced ride, while the addition of a turbocharger gives it plenty of power and responsiveness. Compared to other engines in its class, the Boxer 6 Turbo engine offers more low-end torque, making it more capable of handling heavy loads or towing. It’s also more fuel-efficient than many other engines in its class, making it a great choice for both performance and practicality.

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Q: How much power does the Boxer 6 Turbo engine produce?

A: The exact power output varies depending on the vehicle it’s installed in, but the Boxer 6 Turbo engine is capable of producing upwards of 260 horsepower and 277 lb-ft of torque.

Q: Is the Boxer 6 Turbo engine reliable?

A: Yes, Subaru has a reputation for building reliable engines, and the Boxer 6 Turbo is no exception. The engine has been designed to handle the additional stress of the turbocharger, and its strengthened components and updated systems help ensure it’s reliable and long-lasting.

Q: How does the Boxer 6 Turbo engine compare to other turbocharged engines?

A: The Boxer 6 Turbo engine is unique in its horizontally opposed cylinder design, which provides a balanced and smooth ride. It also offers more low-end torque than many other turbocharged engines, making it more capable of handling heavy loads and steep terrain.


Subaru’s Boxer 6 Turbo engine is a unique and powerful offering that’s perfect for car enthusiasts who are looking for both performance and practicality. With its horizontally opposed cylinders and low-inertia twin-scroll turbocharger, this engine delivers plenty of power and responsiveness, while still being fuel-efficient and reliable. So whether you’re looking for a smooth ride or a powerful engine, the Boxer 6 Turbo has you covered.

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Davis Bellew

As a Subaru owner and enthusiast, Davis has a deep understanding of the needs and concerns of Subaru drivers. He specializes in writing informative and engaging content about Subaru maintenance and repair, and his articles are always well-researched and easy to understand. When he's not writing, he enjoys hiking and photography.

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