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Rolls Royce Phantom III (1936 - 1939)
 


 

Rolls-Royce announced its first - and until the advent of the new Rolls-Royce Silver Seraph in 1998 - their only V-12 powered car in late 1935. The engine being acclaimed as silky smooth then gave the car exceptional acceleration but in the meantime has earned a reputation of being a sort of Achilles' heel... Though the company had many years' experience developing V12 aero engines they had taken their time before introducing this configuration into their motor car production. The 7,338 cc V12 power unit had overhead valves operated by a single camshaft in the angle of the vee. Independent front suspension to a design from General Motors was a new feature too and the particularly compact engine could be arranged in more forward position allowing greater space for bodywork than the previous Phantom II. 727 cars were built.

Wheelbase 3607 mm 142 in  
Track front 1588 mm 62.5 in  
rear 1588 mm 62.5 in  
Length 5410 mm 213 in  
Width 1905 mm 75 in  
Ground clearance 222 mm 8.7 in  
Kerb weight 2642 kg 5825 lb  
Fuel capacity 150
litres
33
UK Gal
39.6
US Gal
engine
Manufacturer Rolls-Royce
Type V-12
Wet sumped
OHV
24 valves total
2 valves per cylinder
Bore stroke 82.50mm 114.30mm
3.25 in 4.5 in
Bore/Stroke ratio 0.72
Displacement 7340 cc
(447.914 cu in)
Unitary capacity 611.67 cc/cylinder
Aspiration Normal
Max. output 167.3 PS (165.0 bhp) (123 kW)
@3000 rpm
Coolant Water
Specific output 22.5 bhp/litre
0.37 bhp/cu in
Top speed 137 km/h
Power-to-weight 62.45 bhp/ton
chassis
Engine location Front
Engine alignment Longitudinal
Turning circle 14.60 m
Suspension Front I.
Rear LA.SE.
Wheels F/R 4.00 x 18/4.00 x 18
Tyres F 7.00 x 18
Tyres R 7.00 x 18
Brakes F/R Dr/Dr-S
Transmission 4M
Drive RWD
Top gear ratio 1.00
Final drive ratio 4.25