25/30 hp
(1936-1938)
Model : 6 cylinder in line
Year : 1936-38
Bore : 3 1/2"
c.c. : 4,257
Stroke : 4 1/2"
h.p. : 25/30
Chassis : Channel section frame with tubular cross-members, (Wraith) Welded frame with cruciform centre bracing
Wheelbase : 11', (Wraith) 11' 4"
Transmission : Hypoid rear Axle, (Wraith) synchromesh on 2nd, 3rd and top gears
Steering : Cam and roller
Suspension : Adjustable hydraulic shock dampers controlled by pump and governor on gearbox with overriding hand control on steering wheel base. (Wraith) Independent front suspension by wishbones and horizontal coiled springs enclosed in oil-filled casings.
Brakes : Four-wheel brakes with friction disc servo driven gearbox. (Wraith) Handbrake and footbrake used same shoes in rear drums.
The 25/30 had a bought-out Stromberg carburetter and SU petrol pumps. The 4,257 cc engine was also adopted for the Bentley. The final development of the pre-war small-horsepower Rolls-Royce came in 1938 with the introduction of the 25/30 hp "Wraith" - more popularly known simply as the Wraith. In this model the traditional Rolls-Royce attributes of silence and smoothness were developed to a remarkable degree.
The chassis of the Wraith was entirely new with a crucifom bracing rather like that of its larger stablemate, the Phantom III and of largely welded construction. The most important new feature, however, was the independent front suspension, which was similar to that of the Phantom III.