The Phantom I, which differed from the Ghost only in cylinder capacity and having overhead valves had a relatively short lifespan (1925-1929), and a total of 2,212 were built. It saw few modifications, and all there were were in the suspension (hydraulic shock-absorbers on the front wheels in 1926, and on the back in 1927).
1929 was the Phantom II series, with various modifications from the Phantom I (different engine block and bearings); in many people’s opinion it gave the model back its traditional flexibility and silence. Opinions were divided, however. Some described it as a truck, others compared its smooth running to a ‘velvet carpet’ . Progress had been made in that the mechanical components lasted longer, and it was less expensive to run (though still very far from cheap: less than 15 miles to the gallon).
Car : Rolls-Royce Silver Ghost
Year : 1907
Engine : 6 cylinders in line
Bore and stroke : 114×114 mm
Cylinder capacity : 7035 cc
Gears : 4 forward
Brake horse power : 48
Maximum speed : 63 mph
Wheelbase :11 ft 2 ins (3.4 m)
Suspension : front: semi-elliptic leaf- springs; back: semi-elliptic leaf- springs with
auxiliary transverse leaf- springs

Car : Rolls-Royce 20
Year : 1922
Engine : 6cylinders in line
Bore and stroke : 76.2×114.3 mm
Cylinder capacity : 3127 cc
Gears : 3 forward
Brake horse power : 50
Maximum speed : 65 mph
Wheelbase : 10 ft 9 ins (3.27 m)
Suspension : front and back : semi-elliptic leaf- springs integrated with friction shock-
absorbers

Car : Rolls-Royce Phantom I
Year : 1925
Engine : 6 cylinders in line
Bore and stroke : 107.95×139.7 mm
Cylinder capacity : 7688 cc
Gears : 4 forward
Brake horse power : 95
Maximum speed : 90 mph
Wheelbase :12 ft 0 ins (3.65 m) or 12 ft 6 ins (3.81 m)
Suspension : front: semi-elliptic leaf- springs; back: cantilever leaf- springs