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From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Comparative table of components for Peregrine and Bentley models, detailing shared and specific parts.

Identifier  ExFiles\Box 179\1\  img192
Date  23th December 1931 guessed
  
SECTION
COMMON TO BOTH PEREGRINE AND BENTLEY
SPECIFICATION F PEREGRINE
SPECIAL TO BENTLEY

ENGINE
Crankshaft, con rods, and pistons, valves, springs, fittings & guides. Water and oil pumps, oil relief unit. Petrol pump & other small accessories.
Scaled down from J.{Mr Johnson W.M.} 3.
Bore 69.5 mm Stroke 105 mm.
Approx: 2.720 X 4.125.
Tax £18.
RR. carburetter.
Overhead camshaft engine with s'charger in front driven off crankshaft.
Carb: bought out (?)

CLUTCH AND FLYWHEEL
Clutch & casing including operating shaft.
Single plate scaled down from J.{Mr Johnson W.M.} 3.
Stronger clutch spring load.

PROPELLER SHAFT
Mechanic's Joints, common shafts, different lengths.
Same as J.{Mr Johnson W.M.} 3. except shaft.
Shorter shaft.

GEARBOX (1st suggestion.)
WHEELS & shafts only.
Synchro mesh 3rd. speed scaled down from J.{Mr Johnson W.M.} 3. with no servo & with side lever.
Another box with same wheels, but central levers.

GEARBOX (2nd suggestion.)
Complete box with central levers & no servo scaled down from J.{Mr Johnson W.M.} 3.
Synchro mesh 3rd. speed scaled down from J.{Mr Johnson W.M.} 3. No servo, & with central levers.
Position of levers.

REAR AXLE AND TUBES
Whole axle and tubes except gears.
Scaled down J.{Mr Johnson W.M.} 3. 3.75 to 1 ratio.
Higher ratio gears 4.1 to 1 ratio.

REAR BRAKES
All parts.
Single set of shoes, 12" drums, 2 ropes to shoes, rest scaled down from J.3.
-----

RADIATOR & SHUTTERS
Thermostat and shutter mechanism.
Scaled down from J.{Mr Johnson W.M.} 3. J.3. shutter mechanism & thermostat.
Bentley radiator, sloping.
  
  


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