The ultimate pre-war small horsepower Rolls-Royce, the Wraith was more refined than the 25/30. It had an improved engine with a crossflow cylinder head and independent front suspension, similar to the larger Phantom III. However production was curtailed by the intervention of World War 2 and it therefore remains a comparatively rare car.

Production numbers
1938 - 1939
6 cylinders, capacity 4257cc. Monobloc with detachable cast iron 6-plug head, deturbulated from 1937. Overhead pushrod operated valves. 7-bearing crankshaft with vibration damper. Pressure fed lubrication with relief valve feeding rocker shaft and timing gears. Oil capacity 14 pints.
Ignition system
Coil system with standby coil mounted together. Centrifugal advance with hand override.
Cooling system
Engine driven water pump and fan. Thermostat. Fixed radiator shutters.
Stromberg downdraught carburettor, fixed jet, with accelerator pump. Water heated inlet manifold.
18 gallon rear tank with double SU pumps mounted on the chassis. Electric gauge. Low fuel warning light.
4-speed gearbox in unit with engine. Synchromesh 3rd and top. Right hand gearchange. Clutch, single dry plate type. Open drive propeller shaft.
Independent coil spring front suspension incorporating adjustable hydraulic dampers. Semi-elliptic rear springs, hydraulic dampers. All dampers automatically adjusted to suit road speed but can be over-ridden by driver.
Internal expanding 4 – wheel operation with independent handbrake on the rear wheels. Mechanical brake servo motor driven from the gearbox.
Marles cam and roller steering box.
Chassis lubrication
‘One-Shot’ centralised lubrication system.
Jacking system
Integral hydraulic jack on each wheel operated from within the car by a hand pump and lever.