The RML Group, a renowned British engineering firm with four decades of motorsport and engineering innovation, recently unveiled its limited-edition P39 hypercar prototype at Supercar Fest The Runway 2025. This highly anticipated debut showcased a vehicle designed to push the boundaries of performance while maintaining exceptional road usability. The P39 is set to make further appearances at the Supercar Driver Secret Meet at Silverstone on June 17 and the Silverstone Festival from August 22-24, offering enthusiasts more opportunities to witness its capabilities firsthand.
Aerodynamics: Redefining Downforce and Control The P39 features a completely re-sculpted carbon fiber body adorned with active aerodynamic devices. These elements significantly recalibrate the Porsche 992.1 Turbo S platform’s performance. An electronically controlled rear wing conceals its second element in Road mode, then deploys and pivots in Track mode to create a slot gap that boosts rear wing downforce by 24 percent. A driver-selectable Drag-Reduction System (DRS) can flatten the element, reducing drag by 23 percent for maximum straight-line velocity. At the front, an extending splitter slides 75 mm forward in Track mode, increasing surface area and shifting the center of pressure forward for sharper turn-in. Complementary airflow management, including air curtains around the front wheels, fender cut-outs, an under-body diffuser, and vented rear arches, elevates overall downforce from the Turbo S’s stock 1,432N to 5,100N in Road mode and over 6,500N in Track mode at 150 mph. These figures position the P39 in direct competition with purpose-built GT racers while preserving ride quality for road use.
Chassis: Optimized for Grip and Comfort To fully exploit the P39’s enhanced aerodynamic grip, RML engineers have meticulously re-imagined the chassis. New suspension links widen the track, while bespoke top mounts preserve ideal camber angles. Secondary springs increase wheel rates in Track mode without compromising ride quality on the road. Bespoke R53-supplied dampers, finely tuned by RML, provide the driver with three cockpit-selectable settings. A four-corner hydraulic lift system offers two rear and three front ride-height options, accommodating everything from speed bumps to pit-lane navigation. The anti-roll hydraulics and rear-wheel-steer system have been recalibrated to suit the P39’s lower stance, wider track, and longer wheelbase. The vehicle rides on bespoke alloys—20×10 inches at the front and 21×12 inches at the rear—fitted with customer-specified tires.
Powertrain and Performance Details: A Heart with Multiple Personalities The heart of the RML P39 is its twin-turbo flat-six engine, which has undergone an exhaustive re-engineering program in collaboration with Litchfield Motors. This meticulous work includes larger-diameter intake and exhaust plumbing, a unique Inconel exhaust valve—the largest ever fitted to a road-going flat-six—and optimized thermal routing. These enhancements result in a formidable output of 920 horsepower and 705 lb-ft of torque in Sport/Sport+ mode. The P39 also offers two additional presets, allowing the powertrain to adapt to different driving conditions: a 600-hp Wet mode for low-grip situations and a 750-hp Normal mode for fast road driving. All bespoke components come with a 12-month/12,000-mile warranty, and over-the-air diagnostics and calibration updates ensure the P39 continuously evolves with its owner. This blend of raw power and adaptable settings provides unrivalled road-to-track versatility.
Leadership Perspective: Vision Behind the Velocity Michael Mallock, Board Member responsible for RML’s Bespoke Division, emphasized the P39’s dual nature, stating, “From the outset we set ourselves the challenge of building a car which could switch personalities at the touch of a button – serene on the road, savage on the circuit. The numbers speak for themselves, but what excites me most is how intuitive and confidence-inspiring the P39 feels, whatever the setting.” Paul Dickinson, CEO of RML Group, added, “P39 is a rolling demonstration of what RML’s Engineering Division can achieve. By integrating active aerodynamics, a re-imagined chassis and a 920hp powertrain, we have created a hypercar that delivers relentless track performance yet remains perfectly at home on the King’s Road. It is the purest expression of 40 years of engineering excellence, distilled into a car that wears our badge with pride.”
Availability: Exclusive and Tailored The RML P39 will be produced in a strictly limited run of just 39 cars, ensuring exclusivity for its owners. The first UK customer deliveries are anticipated in late summer 2025, following final tuning and validation testing. RML offers a comprehensive range of bespoke options, allowing customers to personalize their P39 to their exact specifications. Sales and aftercare agents have been appointed in both the US and Europe to cater to a global clientele.
Summary
- RML Group debuted the P39 hypercar prototype at Supercar Fest The Runway 2025.
- The P39 transforms the Porsche 992.1 Turbo S platform for hypercar performance.
- Active aerodynamics provide over 6,500N of downforce in Track mode.
- The re-imagined chassis offers both track capability and ride comfort.
- The twin-turbo flat-six engine delivers 920 horsepower.
- The P39 features multiple driving modes, including Wet (600hp), Normal (750hp), and Sport/Sport+ (920hp).
- Production is limited to 39 cars, with first UK deliveries in late summer 2025.
- Bespoke options and international sales support are available.
Disclaimer: Specifications and features are subject to change as RML continues development and validation of the P39 hypercar. Performance figures are estimates and may vary based on driving conditions.
Source: RML
AI Assistance: Gemini
