How well does the engine of the royalty car Rolls Royce Phantom perform and is the car available with a diesel engine?

Which car generates better power and torque, Rolls Royce Phantom Coupé or Bentley Continental Flying Spur?

Which model gives a better engine performance and fuel economy, Bentley Arnage RL or Rolls Royce Phantom ?

Which of the two cars is a better sedan Bentley Mulsanne or similar models from brands like Rolls Royce Ghost Old?

do Rolls Royce Phantom has nitrogen filled tires?

I am interested in Rolls Royce Phantom at Hyderabad, regt. date 2005 July. Is the centre of the each wheel hub bear the interlinked RR logo which remains upright at all times?