The most silent motor car in the world, the Rolls-Royce Phantom
From the moment Sir Henry Royce introduced the Rolls-Royce Phantom in 1925 it was judged ‘The Best Car in the World’ by the cognoscenti. As a result it has conveyed some of the world’s most influential and powerful men and women to the most defining historical moments over the last 92 years.
Incalculable effort was expended to create ‘the most silent motor car in the world’ including 6mm two-layer glazing all around the car, more than 130kg of sound insulation, the largest ever cast aluminium joints in a body-in-white for better sound insulation, and use of high absorption materials.
Acoustic insulation from road noise has been helped by the employment of double skin alloy on areas within the floor and bulkhead of the spaceframe. This is a feature unique to New Phantom. Further noise insulation by inserting dense foam and felt layers are between these skins to provide sound insulation not witnessed before in the car industry.
In addition, high absorption layers within the headliner, in the doors and in the boot cavity have further aided insulation and reduced reverberation. Rolls-Royce also worked closely with its tyre supplier to invent ‘Silent-Seal’ tires – which feature a specific foam layer placed inside the tyre to wipe out tyre cavity noise and reduce overall tyre noise by 9db, meaning that conversation within the car is completely effortless.
All in all it is a perfect 360° cocooning effect in a motor car that is approximately 10 per cent quieter than its predecessor at 100km/h. Indeed, when Rolls-Royce’s acoustic test engineer first reviewed results road and vibration tests, the sound levels were so low they had to check their instruments were calibrated correctly.
The heart of a Rolls-Royce – the magnificent V12 reinvented
At the heart of every Rolls-Royce of the modern period lies the power of a V12 engine. At the beginning of this next chapter of Rolls-Royce’s existence, and with the creation of the Architecture of Luxury, the New Phantom also benefits from a completely new engine.
With the focus on creating the most silent motor car in the world, a completely silent engine was also required, and that meant more low-end output at lower revs to ensure that silence. Hence a completely new, 6.75-litre V12 powertrain has been engineered for New Phantom, in place of the previous naturally aspirated V12 engine.
The new V12 Phantom engine employs two turbo chargers that contribute to a low-end torque output of 900Nm at an incredibly low 1,700rpm whilst also delivering 563bhp or 420kW of power, resulting in calm low speed progress associated with state occasions and an unfussed surge of power when one needs to press on. The addition of Satellite Aided Transmission (SAT), married to a ZF 8-Speed gearbox also ensures that the driver is prepared for whatever the road has in store for them.
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