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Rolls Royce 20 hp ( 1922 - 1929)
 


 


Rolls-Royce 20 H.P., 1927, Bertelli Sports Tourer

Code-named "Goshawk" several experimental chassis had shown most promising results when severe tests of the first 'baby' Rolls-Royce had been executed. The Rolls-Royce 20 hp is easily recognizable by its horizontally arranged radiator shutters (only the last series sported vertical shutters). With a shorter wheelbase and a more economical engine it proved an ideal addition to Rolls-Royce's range as a second model alongside the Silver Ghost. Its lighter weight and a reduced turning circle gave the 20 hp fine handling. large number were provided with formal coachwork and heavy bodies didn't enhance performance. 2885 Rolls-Royce 20 H.P. were built.

Wheelbase 3277 mm 129 in  
Track front 1422 mm 56 in  
rear 1422 mm 56 in  
Length 4521 mm 178 in  
Kerb weight 1930 kg 4255 lb  
engine
Manufacturer Rolls-Royce
Type S-6
SV
12 valves total
2 valves per cylinder
Main bearings 7
Bore stroke 76.20mm 114.30mm
3 in 4.5 in
Bore/Stroke ratio 0.67
Displacement 3127 cc
(190.821 cu in)
Unitary capacity 521.17 cc/cylinder
Compression ratio 4.80:1
Fuel system 1 Rolls-Royce carb
Aspiration Normal
Max. output 50.7 PS (50.0 bhp) (37.3 kW)
@3000 rpm
Coolant Water
Specific output 16 bhp/litre
0.26 bhp/cu in
Top speed 105 km/h
Power-to-weight 25.91 bhp/ton
chassis
Engine location Front
Engine alignment Longitudinal
Suspension Front LA.SE.
Rear LA.SE.
Tyres F 32 x 4.5
Tyres R 32 x 4.5
Brakes F/R -/Dr
Transmission 3M
Drive RWD