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Rolls-Royce Silver Dawn 4.2

(1955 model)

Brief specs of 1955 Rolls-Royce Silver Dawn 4.2

4-door 7-seater, petrol (gasoline) 6-cylinder 12-valve straight (inline) engine, 4255 cm3 / 259.7 cu in / 259.7 cu in, rear wheel drive

units: metric UK US

Basic (general) data

Marque (make)Rolls-RoyceIssued from1955
ModelSilver Dawn 4.2Issued until
SerieSilver DawnNumber made
Model familyBody construction
Model codeBody designation
ManufacturerRolls-Royce Motor CarsCountryUK

Bodywork

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

Dimensions & Weight

Length5170 mm / 203.5 in / 203.5 inTotal (curb) weight1830 kg / 4034 lb / 4034 lb
Width1760 mm / 69.3 in / 69.3 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)2.51 m2 / 27.1 sq ft / 27.1 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 displacement4255 cm3 / 259.7 cu in / 259.7 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)
CoolantSpecific output
Catalytic converterSpecific torque

Transmission

Transmission typeNumber of gears
Wheel driverear wheel driveTop gear (drive) ratio
  Final gear (drive) ratio

Performance

Acceleration 0-50 mph (80 km/h)Top (maximal) speed
Acceleration 0-60 mph (97 km/h)Power-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 front235/70-VR16Tyres rear235/70-VR16
Brakes frontBrakes rear
Brake diameter frontBrake diameter rear
Brakes detailsABS (anti-lock braking system)Braked area

Technical specifications and performance data of Rolls-Royce Silver Dawn 4.2

Infobox

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