When we think of boxer engines, Porsche and Subaru usually come to mind, as both have been utilizing this design for years, with varying degrees of success. Subaru has adopted a more traditional method for engine development in recent times, while Porsche continues to innovate with thrilling models like the latest 911 GT3 RS. There are no signs suggesting an end to the boxer engine era at Porsche just yet.
Although Porsche and Subaru are recognized for their expertise in constructing boxer engines, neither holds the title for the most potent boxer engine to date. That distinction belongs to RUF, a celebrated performance car manufacturer and Porsche tuning specialist. The impressive engine in question is housed in RUF’s CTR3 Evo, delivering nearly 800 horsepower from just 3.8 liters of displacement—a remarkable achievement for a road car, especially for a boxer engine. We will delve into the specifics of this impressive engine below.
The information regarding the CTR3 Evo’s engine comes directly from RUF, with additional data and images from RUF UK.
The 800-Horsepower Boxer Resides in the RUF CTR3 Evo
Quick Facts about the RUF CTR3 Evo
- Features a power density of 210.5 horsepower per liter
- Only 15 units of the CTR3 Evo have been produced
- It is the third variation of RUF’s CTR3 series
A power-packed engine deserves a corresponding high-performance vehicle, and RUF has delivered with the 800-horsepower boxer in the CTR3 Evo. As the third iteration in RUF’s CTR3 series, this model shares a front-end design reminiscent of many Porsche vehicles, yet it stands out as a unique model. RUF operates as an independent manufacturer, distinguishing itself from other Porsche-focused tuners like Singer.
Specifically, the CTR3 Evo represents the culmination of RUF’s recent engineering endeavors. While the blue wheels might spark debate, the supercar showcases impressive capabilities. It boasts advanced features like a lightweight carbon-composite body and a steel chassis, complemented by an internal roll cage to manage the immense power produced by its 3.8-liter boxer engine.
Furthermore, the CTR3 Evo is equipped with massive six-piston brake calipers that grip substantial 380-millimeter carbon-ceramic brake rotors on both the front and rear axles. The suspension is meticulously engineered, featuring MacPherson struts with stabilizer bars at the front, and a racing-inspired multi-link rear suspension with horizontal coilovers, enhancing agility during cornering.
As of now, RUF has not disclosed pricing for the Evo, but given that the previous CTR3 Clubsport retailed for $725,000, it is reasonable to anticipate that the Evo will exceed this amount. RUF recently revealed the second CTR3 Evo produced, which has arrived in the U.S., and with the level of craftsmanship involved, a price under seven figures would seem a bargain.
How the CTR3 Evo Achieves 800 Horsepower
|
RUF CTR3 Evo Specs |
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|---|---|
|
Engine |
3.8-Liter Twin-Turbo Flat-Six |
|
Horsepower |
800 hp @ 7,100 rpm |
|
Torque |
730 lb-ft @ 4,000 rpm |
|
0-60 MPH Time |
3.2 seconds |
|
Top Speed |
236 mph |
The specifications of RUF’s latest engine highlight its exceptional capabilities, particularly the 3.8-liter flat-six that outshines previous iterations. Achieving 800 horsepower from an engine of similar size to that found in the 2024 Hyundai Palisade is no small feat, but RUF’s engineers are determined to create an unmatched boxer engine.
This 3.8-liter flat-six engine is equipped with twin turbochargers and features dual intercoolers to manage the intense heat generated at high throttle levels. Additionally, the CTR3 Evo’s 24-valve engine integrates variable valve timing via electronically controlled camshaft adjustments. This design ensures optimal engine combustion and efficiency, thanks to the hydraulically adjusted valve lift.
To maintain a lightweight structure, the engine’s block and cylinder heads are constructed from aluminum. A dry-sump oil system is utilized, which is particularly beneficial for racing and high-performance vehicles, storing the oil separately in a tank. This design limits oil sloshing in high-G cornering, reducing the chances of oil starvation compared to traditional wet-sump systems that might lead to a severe decrease in engine performance.
How the Evo’s Boxer Differs from Porsche’s
Although both the Porsche GT2 RS and the RUF CTR3 Evo have similar engine layouts and displacements, significant differences exist.
The 997 GT2 from Porsche contains a 3.6-liter twin-turbocharged flat-six that produces 612 horsepower in the RS model, alongside 516 lb-ft of torque. This engine operates at lower RPMs and lacks the technological advancements present in the Evo, such as variable hydraulic valve lift. If RUF were not a certified automotive manufacturer, the GT2 RS’s engine might hold the title for the most power-dense boxer.
Why Porsche Has Maintained the Boxer Engine
This article has focused mainly on the advancements of the RUF CTR3 Evo and its powerful boxer engine. However, it is also important to understand why Porsche has remained committed to this engine style throughout its history.
Porsche’s affinity for horizontally-opposed engines dates back to 1948 with the introduction of the Porsche 356, the company’s first car following WWII. At that time, the benefits of the boxer engine included a flat structure that facilitated air-cooling. Additionally, the boxer design promotes engine balance due to the short crank strokes, allowing simultaneous movement of the piston banks for smoother operation.
Over the years, as most manufacturers moved away from flat engines, Porsche continued to refine this design. Whether seen as stubbornness or commitment, Porsche has successfully developed its engines over the decades. While the original air-cooling feature has become obsolete, boxer engines still offer a low center of gravity advantageous for high-performance vehicles. The low position of the engine allows for better handling, which is vital for competitive sports cars, and Porsche’s prowess in this area is well recognized.
Sources:
RUFAutomobile.uk
.
