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Rolls-Royce
20/25
P series
Home
The Cars
Rolls-Royce
20/25

Rolls-Royce 20/25: P series

Notes on P series 20/25

P series chassis have chassis numbers prefixed GGP, GDP and GWP.

New features in P-series
Narrow wheel hubs fitted.
Crankshaft bearing diameters increased: 2.125" diameter main bearing journals and 1.75" crank pin diameter.
From GDP36 - modified rear shock dampers.

Filtered parts list by Section

Part CodeSub-section
AA Chassis frame, mountings, brackets etc
AD Bulkhead and fittings
BA Front springs and shackles
BC Rear springs and shackles
BD Rear damper links
BE Shock dampers
BF Front damper link, 20hp & early 20/25, Silver Ghost and early Phantom 1
CA Axle beam and stub axles
CB Front hub and brakedrum
CC Front brakes
DA Differential assembly
DB Rear hub and brakedrum
DC Rear brakes
EA Brake servo
EB Brake equaliser shafts
FA Steering box and column
FB Side tube
FC Cross tube
GA Cylinder head
GB Cylinder block and pistons
GC Crankshaft assembly and conrods
GD Flywheel and clutch
GE Crankcase and main bearings and fittings
GF Vibration damper
GG Timing gears and auxiliary drives
GH Camshaft and followers
GJ Sump, filter, oil pump and pipes
GK Fan
HA Gearbox
HE Propshaft and damper
JA Petrol tank
JB Pipes and filters
JC Fuel pumps
JD Carburettors, air silencer and inlet manifold
KA Radiator
KB Water pump and Y-pipe
KC Radiator mountings
KD Thermostat
KE Radiator shell and shutters
LB Ignition system
LC Dynamo
LD Starter and Bendix drive
LF Charging and distribution
MA Exhaust system
NA Pedals and linkage

Chassis Numbers

View the Chassis Numbers for the Rolls-Royce 20/25: P series