Limited to 100 units worldwide, the coachbuild collection will undergo 350 weeks of cumulative testing. The program begins in southern Europe, where Rolls-Royce first established its validation methods over a century ago. The piano boot will be put through up to 15,000 open-and-close cycles.

The Rolls-Royce coachbuild collection 'Project Nightingale' on the road. [Rolls-Royce Motor Cars]
The Rolls-Royce coachbuild collection 'Project Nightingale' on the road. [Rolls-Royce Motor Cars]

Rolls-Royce Motor Cars announced Tuesday that it has begun global road testing of the prototype for its coachbuild collection, Project Nightingale.

Unveiled in April, Project Nightingale combines the complete design freedom of coachbuilding with Rolls-Royce's uncompromising all-electric powertrain and a new open-top driving experience. Limited to 100 units worldwide, the vehicle represents the boldest expression of what Rolls-Royce can achieve today while pointing toward the brand's future.

Project Nightingale will undergo the most rigorous global testing program in the brand's history, accumulating 350 weeks of cumulative trials. Real-world road testing will span a wide range of environments — from Mediterranean coastal roads and the Arctic Circle to the deserts of the Arabian Peninsula — validating the vehicle's performance in extreme temperatures and at altitudes of up to 2,750 meters above sea level.

The testing program is set to begin in southern Europe, where Rolls-Royce first established its approach to validating early vehicle development more than a century ago.

The name Project Nightingale derives from "Le Rossignol," the French word for nightingale. Le Rossignol was also the name of the residence that Henry Royce built for his designers and engineers near his winter retreat on the French Riviera. In the early 20th century, Rolls-Royce engineers used that base and a test facility in Châteauroux to conduct speed and endurance trials on routes including the road between Monte Carlo and London.

The rigorous validation philosophy that has defined Rolls-Royce for more than a century carries through to the development of Project Nightingale. Development began roughly three years ago, and the project has now entered full-scale road testing. The prototype has already completed more than 1,430 hours of aerodynamic analysis, including advanced digital simulation and wind tunnel testing.

The aerodynamic design of Project Nightingale will be validated again at a confidential high-speed test facility, where the vehicle will reach speeds of up to 249 kilometers per hour.

Airflow inside the cabin will also receive careful attention. A fully electric wind deflector — newly developed and patented by Rolls-Royce specifically for Project Nightingale — will be tested across a range of speeds. The device prevents high-pressure air generated at the rear of the vehicle from re-entering the cabin, reducing interior turbulence while helping retain warmth inside when driving with the roof open in cold weather.

The same commitment to refinement and ride comfort extends to the roof. A proprietary sound-absorbing material combining cashmere, fabric and high-performance composite materials lines the roof's interior, which will undergo 10 separate tests covering the material itself, the opening and closing mechanism, and operational performance. Testing will include conditions at extreme temperatures of up to 80 degrees Celsius.

The engineering details unique to Project Nightingale are also subject to testing. The piano boot — a first for Rolls-Royce — is designed to open sideways via a cantilevered structure and will undergo up to 15,000 open-and-close cycles to ensure smooth operation over time.

Chris Brownlie, CEO of Rolls-Royce Motor Cars, said Project Nightingale carries forward the bold spirit that led Sir Henry Royce to build his experimental "EX" vehicles in the 1920s — a desire to explore what Rolls-Royce could truly achieve, unconstrained by convention. "The testing program begins on the European roads where Rolls-Royce proved its capabilities to the world 100 years ago, and will extend to cover every climate our customers may one day drive in," he said, adding that the team would refine every detail to the highest degree of finish befitting Rolls-Royce and Project Nightingale.

Meanwhile, Rolls-Royce recently unveiled the Phantom Hummingbird, a one-of-one bespoke model inspired by the delicate beauty of nature. The company operates its bespoke program to offer customers personalized products and experiences, creating value while giving them a meaningful opportunity to express their individuality.


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