2015 Subaru BRZ Engine: Specs & Performance

The 2015 Subaru BRZ is a popular sports car known for its agile handling and engaging driving experience. A key component that makes this possible is, of course, its engine. For those wondering, "What engine is in a 2015 Subaru BRZ?", the answer is a 2.0-liter naturally aspirated horizontally opposed (boxer) four-cylinder engine. This engine is co-developed with Toyota, and you'll find a very similar version in the Scion FR-S (later Toyota 86) of the same era. This engine configuration is pretty unique and contributes significantly to the BRZ's low center of gravity, which is essential for its sharp handling characteristics. So, let's dive deeper into the specifics of this engine, its performance figures, and what makes it special for a sports car like the BRZ.

Delving into the 2.0-Liter Boxer Engine

The 2.0-liter boxer engine, designated the FA20, is the heart and soul of the 2015 Subaru BRZ. The 'boxer' configuration means that the cylinders are laid out horizontally, opposing each other. This design allows for a flatter engine profile compared to traditional inline or V-shaped engines. The main advantage of this is a lower center of gravity for the car, which translates to improved stability and cornering ability. The FA20 engine also features dual overhead camshafts (DOHC) and four valves per cylinder, optimizing airflow and combustion efficiency. Direct injection and port injection systems are integrated as well, which Toyota refers to as D-4S. This combination of direct and port injection helps improve both power output and fuel economy. The engine block and cylinder heads are made from aluminum alloy, which helps to keep the overall weight down. Less weight means better acceleration and responsiveness, something every sports car enthusiast appreciates. The engine has a square bore and stroke (86 mm x 86 mm), which tends to lend itself to a balanced torque and horsepower delivery. In simpler terms, it's designed to rev happily and provide a good amount of power throughout the rev range, making it a fun engine to use on the street or track.

Performance Specs of the 2015 BRZ Engine

Now, let's talk numbers! The 2015 Subaru BRZ's 2.0-liter boxer engine delivers a respectable amount of power for its class. The engine churns out around 200 horsepower at 7,000 rpm and 151 lb-ft of torque at 6,400 rpm. These figures might not seem earth-shattering compared to some modern turbocharged engines, but it's important to remember that the BRZ is designed to be more about balanced performance and driving feel than outright speed. The power delivery is smooth and linear, encouraging drivers to rev the engine and make the most of its capabilities. The BRZ is available with either a 6-speed manual or a 6-speed automatic transmission. The manual transmission is often preferred by enthusiasts for its greater driver engagement and control. With the manual, the BRZ can accelerate from 0 to 60 mph in around 6.4 seconds, while the automatic version does it in approximately 7.2 seconds. While these aren't blistering numbers, the BRZ's light weight and responsive chassis make it feel much faster and more exciting than the figures might suggest. Fuel economy is also quite decent for a sports car. The BRZ with the manual transmission achieves an EPA-estimated 22 mpg in the city and 30 mpg on the highway. The automatic version does even better, with 25 mpg in the city and 34 mpg on the highway. These numbers make the BRZ a relatively practical choice for daily driving, without sacrificing the fun factor on weekends.

Why the Boxer Engine Matters in the BRZ

The choice of a boxer engine in the 2015 Subaru BRZ is no accident. It's a deliberate design decision that contributes significantly to the car's unique character and handling prowess. The low center of gravity, as mentioned earlier, is a major benefit. With the engine's weight positioned low and centrally in the chassis, the BRZ exhibits excellent stability and resists body roll in corners. This allows drivers to carry more speed through turns and feel more confident in the car's abilities. Furthermore, the boxer engine's design helps to minimize vibrations compared to other engine layouts. This results in a smoother and more refined driving experience, even when the engine is revving high. The engine's sound is also distinctive, with a throaty growl that adds to the car's sporty appeal. While some may argue that the BRZ could benefit from more power, the engine's balanced performance and responsiveness are perfectly suited to the car's chassis. It's an engine that rewards skilled drivers and encourages them to explore the limits of the car's handling. In short, the boxer engine is an integral part of the BRZ's DNA, and it's what sets it apart from many other sports cars on the market.

Potential Issues and Maintenance of the FA20 Engine

Like any engine, the FA20 in the 2015 Subaru BRZ has some potential issues that owners should be aware of. One common concern is related to carbon buildup on the intake valves, particularly in the earlier models. This can occur due to the direct injection system, which doesn't have fuel washing over the valves to keep them clean. Symptoms of carbon buildup can include rough idling, decreased performance, and reduced fuel economy. To mitigate this, some owners choose to use fuel additives or have the intake valves cleaned periodically. Another potential issue is related to oil consumption. Some BRZ owners have reported that their engines consume more oil than expected, especially during spirited driving. Regularly checking the oil level and topping it off as needed is crucial to prevent engine damage. The FA20 engine also requires regular maintenance to keep it running smoothly. This includes oil changes every 6,000 miles, spark plug replacements every 60,000 miles, and regular inspection of belts, hoses, and other components. Using high-quality synthetic oil is recommended to ensure optimal engine protection and performance. Overall, the FA20 engine is relatively reliable if properly maintained. By addressing potential issues early and following the recommended maintenance schedule, owners can enjoy many years of trouble-free driving.

Aftermarket Upgrades for the 2015 BRZ Engine

For those looking to extract even more performance from their 2015 Subaru BRZ, there are numerous aftermarket upgrades available for the FA20 engine. One of the most popular upgrades is an ECU tune, which can optimize the engine's air-fuel ratio, ignition timing, and other parameters for improved power and throttle response. A tune can often unlock significant gains, especially when combined with other modifications. Another common upgrade is an aftermarket exhaust system, which can improve exhaust flow and reduce backpressure, resulting in a slight increase in horsepower. Many BRZ owners also opt for an upgraded intake system, which can improve airflow into the engine. However, it's important to choose reputable brands and ensure that the intake is properly sealed to prevent unfiltered air from entering the engine. For more significant power gains, some owners consider installing a turbocharger or supercharger kit. These forced induction systems can dramatically increase horsepower and torque, but they also require careful installation and tuning to ensure reliability. Upgrading the engine's internals, such as the pistons, rods, and crankshaft, can further enhance the engine's durability and allow it to handle even more power. However, these upgrades can be quite expensive and are typically reserved for serious enthusiasts. Before making any modifications to your BRZ's engine, it's important to research thoroughly and consider the potential impact on reliability and warranty coverage. Consulting with experienced tuners and mechanics can help you make informed decisions and ensure that the upgrades are properly installed and tuned.

Conclusion: The Heart of the 2015 Subaru BRZ

In conclusion, the 2015 Subaru BRZ is powered by a 2.0-liter naturally aspirated boxer engine that delivers a balanced blend of performance, efficiency, and character. While it may not be the most powerful engine in its class, its low center of gravity, smooth power delivery, and distinctive sound contribute significantly to the BRZ's engaging driving experience. With proper maintenance and care, the FA20 engine can provide years of reliable service. And for those looking to take things to the next level, there are plenty of aftermarket upgrades available to unlock even more performance. The engine is the soul of the car, and it is a testament to what makes the BRZ so enjoyable to drive. Whether you're a seasoned enthusiast or a casual driver, the 2015 Subaru BRZ offers a rewarding and memorable driving experience that is sure to put a smile on your face.