Rolls-Royce Twenty 1922–1929 car dimensions: 4521 mm long, 1800 mm wide and 1740 mm high. Unladen weight is 1,930 kg.
The cabin seats four or five in leather upholstery with wood trim and simple gauges on the dash. Open Phaeton bodywork includes a folding hood and side screens for weather protection. Early cars use a central three-speed gear change. later ones switch to a right-hand four-speed gate. Brakes start as rear-only and gain servo-assisted four-wheel operation from 1925. Dual coil and magneto ignition supports reliable starting. No electronic driver aids appear in period equipment lists.
Open Phaeton bodies carry luggage on a rear grid or fitted trunk. Capacity varies with the specific Park Ward coachwork ordered.
The chassis uses half-elliptic springs all round on a ladder frame with a live rear axle. It suits town driving and light touring with light coachwork. Heavier bodies reduce performance. No published towing or payload figures exist for this generation.
The Park Ward 4-door Phaeton body offers an open cabin with leather upholstery and polished wood trim. Suspension on half-elliptic springs delivers a smooth ride that absorbs road imperfections. The engine runs with exceptional quietness and minimal vibration at cruising speeds. Controls feel light and precise for the driver.
Petrol engine of 3127 cc.
Engine oil change every 1000 miles.
Chassis lubrication points need oil gun attention often.
Four-wheel brakes with mechanical servo from 1925.
Early cars had rear brakes only.
The car runs on petrol fed by carburettor. Fuel use varies with body weight and driving but supports relaxed cruising around 45 to 50 mph.
Servicing centres on regular chassis lubrication with an oil gun at many points, done daily or every 100 miles in use and more often in bad weather. Engine oil changes follow handbook advice at 1000-mile intervals. Other tasks include checking tyres weekly and topping battery acid every 1000 miles. Cared-for examples prove reliable.
Braking started as rear-wheel only. From 1925 four-wheel mechanical servo brakes became standard and provide strong stopping power. No formal crash-test ratings appear in records of the period.
Keeping the car means attending lubrication schedules and using correct oils. Many chassis survive with proper care. Lighter open bodies like the Phaeton keep the car more usable in modern traffic than heavier closed coachwork.
Length 4521 mm, Width 1800 mm, Height 1740 mm, Wheelbase 3277 mm (Twenty 1922–1929)
Sources: manufacturer data, Wikipedia and carfolio.com/conceptcarz.com.