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Rolls-Royce Silver Dawn

(1951 model)

Brief specs of 1951 Rolls-Royce Silver Dawn

4-door 7-seater sedan (saloon), petrol (gasoline) 6-cylinder 12-valve straight (inline) engine, OISE (overhead inlet, side exhaust valve), 4566 cm3 / 278.6 cu in / 278.6 cu in, manual 4-speed transmission, rear wheel drive, 139 km/h / 86 mph / 86 mph top speed

units: metric UK US

Basic (general) data

Marque (make)Rolls-RoyceIssued from1951
ModelSilver DawnIssued until
SerieSilver DawnNumber made
Model familyBody construction
Model codeBody designation
ManufacturerRolls-Royce Motor CarsCountryUK

Bodywork

Base platformNumber of doors4
Bodywork typesedan (saloon)Number of seats7
Bodywork designerCargo capacity (volume)
Passenger space (volume)Max. cargo capacity (volume)

Dimensions & Weight

Length5168 mm / 203.5 in / 203.5 inTotal (curb) weight1880 kg / 4145 lb / 4145 lb
Width1778 mm / 70.0 in / 70.0 inDry weight
Height1676 mm / 66.0 in / 66.0 inLoad capacity
Wheelbase3048 mm / 120.0 in / 120.0 inGross (max.) weight
Track front1442 mm / 56.8 in / 56.8 inTowing weight
Track rear1486 mm / 58.5 in / 58.5 inWeight distribution (front)48.5 % / 48.5 % / 48.5 %
Ground clearanceFuel capacity108 l / 23.8 UK gal / 28.5 US gal
Length/wheelbase ratio1.7  

Aerodynamics

Drag coefficient (Cd, Cx, Cw)Frontal area (A)2.34 m2 / 25.2 sq ft / 25.2 sq ft
Aerodynamic coefficient (Cd×A)Aerodynamic resistance (Aero horse power) at 100 km/h (62 mph)

Engine

Engine CodeTotal number of cylinders6
Engine Typestraight (inline) (Inline, 6 cylinder)Total number of valves12
Engine ManufacturerRolls-RoyceValves per cylinder2
Engine constructionBore92.0 mm / 3.62 in / 3.62 in
Fuelpetrol (gasoline)Stroke114.3 mm / 4.50 in / 4.50 in
Fuel detailsBore/Stroke ratio0.8
Fuel supply1 Ze carbEngine displacement4566 cm3 / 278.6 cu in / 278.6 cu in
Engine Main bearingsUnitary capacity761.00 cm3/cylinder / 46.439 cu in/cylinder / 46.439 cu in/cylinder
Cam DesignOISE (overhead inlet, side exhaust valve)Compression ratio6.8 : 1
SumpwetMax. output power at
AspirationnaturalMax. torque at
Compressor typeN/AMaximum rpm
IntercoolernoMax. net output (power at the wheels)48.4 kW / 64.9 hp / 64.9 hp (est.)
CoolantwaterSpecific output
Catalytic converternoSpecific torque

Transmission

Transmission typemanualNumber of gears4
Wheel driverear wheel driveTop gear (drive) ratio1
  Final gear (drive) ratio3.73

Performance

Acceleration 0-50 mph (80 km/h)11.40 s / 11.40 s / 11.40 sTop (maximal) speed139 km/h / 86 mph / 86 mph
Acceleration 0-60 mph (97 km/h)16.20 s / 16.20 s / 16.20 sPower-to-weight ratio
Acceleration 0-100 km/hFuel consumption, City (urban)
Acceleration 0-100 mph (160 km/h)Fuel consumption, Road (extra-urban)
Acceleration 80-120 km/h (50-70 mph) in topFuel consumption, Mixed (combined)
Standing ¼mile time Fuel consumption, Euro
Standing kilometer time CO2 emissions
  Range

Chassis

Engine locationfrontEngine alignmentlongitudinal
SteeringSteering details
Turns lock-to-lockTurning circle
Suspension frontIndependent, Coil springsSuspension rearLive axle, Semi-elliptic leaf springs
Wheels frontWheels rear
Tyres front7.50-16Tyres rear7.50-16
Brakes frontLTBrakes rearLT
Brake diameter frontBrake diameter rear
Brakes detailshydraulic/mechanical hybrid system, ABS (anti-lock braking system)Braked area

Technical specifications and performance data of Rolls-Royce Silver Dawn

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