No. made : 2,885
Engine : 6 cylinder in-line configuration
Bore & Stroke : 3 x 4 1/2"
Transmission : Single
dry plate type clutch, 3 speeds and reverse, centre gear change,
fully floating rear axle, spiral bevel differential
Chassis : Pressed
steel, parallel girder with tubular crossmembers, semi-elliptic springs
front and rear, friction type shock absorbers, footbrake and handbrake operating brake drums
on rear wheels.
Dimensions : Wheelbase 129"
Performance : Early
models max. speed 62 mph (100 km/h) - later models max. speed
70 mph (112 km/h)
The engine was a little over 3
litres capacity and
was a pushrod overhead valve unit with
cast iron cylinder head and block and aluminium alloy crankcase. A departure from the
Silver Ghost, which represented modern practice and was perfectly logical, but which lacked the
enthusiastic support of both customers and the motoring press, was the three-speed gearbox
with centre change lever. So poor was the reception to this modern feature that later,
when four-wheel brakes were introduced and a new gearbox designed to take the brake servo,
the opportunity was taken to change to a four-speed box with right-hand gate change.
Another fairly controversial feature
of the Twenty was the use of "Hotchkiss drive",
with open propeller shaft and the rear axel located by the semi-elliptic springs.
The Twenty had the same radiator
shape as the Silver Ghost. Early Twenties,
however, had radiused edges to the radiator header tank, which gave it a subtly
different appearance from the sharp-edged structure of the Silver Ghost.
The new gear change was singled
out for particular praise, which was well deserved.
Indeed, having changed to the right hand gear gate, it remainded a feature of all Rolls-Royce cars,
save for left hand drive chassis and a few Bentley Continentals.