Car : Rolls-Royce 20 -25 HP
Year : 1929
Engine : 6 cylinders in line
Bore and stroke : 82.55×114.3 mm
Cylinder capacity : 3670 cc
Gears : 4 forward
Brake horse power : 62
Maximum speed : 68 mph
Wheelbase : 11 ft 0 ins (3.35 m)
Suspension : front and back : semi-elliptic leaf- springs

The chassis of the vehicle was quite new, with centralized lubrication system, semi-elliptic leaf-spring suspension, and final drive through bevel gears. The engine had the same cylinder capacity as the Phantom I, but the combustion chambers and manifolds were completely different, and both inlet and exhaust positioned on opposite sides of the engine. The maximum speed was around 80 mph. In 17 seconds it could go from about 10 mph to around 50. 1,767 Phantom IIs were built. A third Phantom series appeared in 1935, the main innovations being in the engine: no longer 6 cylinders in line , but 12 cylinders V, at an angle of 60° , overhead valves, and cylinder capacity of 7340 cc( bore and stroke: 82.5×114 mm), developing 165 bhp at 3000 revs. Other details included: aluminium head, dual ignition, and twin electric feed pump, 4-speed synchromesh transmission, and independent front suspension with coil springs; its speed was 85 mph. 710 of these were built.
The 20-25 in 1929 saw in return to a smaller cylinder capacity engine; this car was also designed to bring the Bentley back on the scene (Rolls-Royce had taken over Bentley in 1931). The Bentleys had the same engine as the 20-25 HP, although overall they were more sporting cars. A total of 3,827 20-25 HPs were built, as against 1,191 Bentley 3½ litres. In 1936 the 20-25 HP became 25-30 HP (engine enlarged to 4257 cc), and another 1,201 were added to the 3,827 of the previous model. The Bentley becam 4¼ litre, and 1,241 were made.
Henry Royce died on April 22, 1933, and thereafter, as an expression of respect, the two Rs of the trademark became black.