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Rolls-Royce Silver Dawn 4.6

(1955 model)

Brief specs of 1955 Rolls-Royce Silver Dawn 4.6

4-door 7-seater sedan (saloon), petrol (gasoline) 6-cylinder 12-valve straight (inline) engine, 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 from1955
ModelSilver Dawn 4.6Issued 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

Length5170 mm / 203.5 in / 203.5 inTotal (curb) weight1866 kg / 4114 lb / 4114 lb
Width1780 mm / 70.1 in / 70.1 inDry weight
Height1680 mm / 66.1 in / 66.1 inLoad capacity
Wheelbase3050 mm / 120.1 in / 120.1 inGross (max.) weight
Track frontTowing weight
Track rearWeight distribution (front)
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)2.54 m2 / 27.4 sq ft / 27.4 sq ft (est.)
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 ManufacturerValves per cylinder2
Engine constructionBore
Fuelpetrol (gasoline)Stroke
Fuel detailsBore/Stroke ratio
Fuel supplyEngine displacement4566 cm3 / 278.6 cu in / 278.6 cu in
Engine Main bearingsUnitary capacity
Cam DesignCompression ratio
SumpwetMax. output power at
AspirationMax. torque at
Compressor typeMaximum rpm
IntercoolerMax. net output (power at the wheels)37.9 kW / 50.8 hp / 50.8 hp (est.)
CoolantSpecific output
Catalytic converterSpecific torque

Transmission

Transmission typemanualNumber of gears4
Wheel driverear wheel driveTop gear (drive) ratio
  Final gear (drive) ratio

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 frontSuspension rear
Wheels frontWheels rear
Tyres front8.x15Tyres rear7.50-16
Brakes frontdrumBrakes reardrum
Brake diameter frontBrake diameter rear
Brakes detailsABS (anti-lock braking system)Braked area

Technical specifications and performance data of Rolls-Royce Silver Dawn 4.6

Infobox

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