What is the fuel economy of the Rolls Royce Phantom and how does it compare to other luxury cars in its class?

The fuel economy of the Rolls-Royce Phantom is not its main selling point, with an estimated fuel consumption of around 14.8 L/100km in the city and 9.4 L/100km on the highway. This fuel economy is similar to other luxury cars in its class, such as the Bentley Mulsanne, which has a similar fuel consumption of around 14.6 L/100km in the city and 9.1 L/100km on the highway.