«Rolls-Royce 20/25» represents model of the car which has been constructed during between 1929 and 1936. For the first time the new car has been presented to general public per 1929. Dimensions of a vehicle make: wheel base – 3,27 m, and about 1930 3,35 m; length of 4,57 m.
On the car «Rolls-Royce 2025» has been established six cylinder engine which volume significantly has been increased up to 3,6 liters, due to an increase of diameter of a head of the block of cylinders about 76 mm up to 82 mm. In the engine carburetor «Rolls-Royce», as well as two coils of ignition have been established. In the block with the power unit four step mechanical box of switching of transfers has been established.
The chassis of the car was rigid, and realization of effective braking was possible owing to mechanical features of brake system of the car at which the brake effort is distributed on all four wheels of the car. Back brakes have been adapted for use of a manual brake. The famous radiator «Rolls-Royce» with a triangular top part used vertical jalousie which angle could be changed for increase of efficiency of cooling of the engine. Jalousie of a radiator can be changed, by means of the special lever which has been established on the instrument panel. It is necessary to note, that more recent versions of execution of the car «Rolls-royce 20/25» have been equipped by the automatic control of functioning of the power unit over system of regulation of heating and cooling of the engine.
The maximal speed of a vehicle reached 121 kilometer at an o'clock while the majority of buyers was preferred with greater limousines.
It is necessary to note, that only the body and mechanical parts of the car have been developed and designed by experts of company «Rolls-Royce». Thus the most popular versions of execution of a body of the company «Rolls Royce» have been used at creation of such models, as: « Park Ward », «Maberly», «Mulliner». Owing to many innovative decisions, as well as magnificent design approaches it was possible to develop magnificent design of the new car «Rolls-royce 20/25». Thus designers managed to create not only solid design of the external ex-terrier, but also magnificent design of an internal interior, with application of innovative materials of that time.