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Armstrong Siddeley 20

(1938 model)

Brief specs of 1938 Armstrong Siddeley 20

4-door 5-seater sedan (saloon), petrol (gasoline) 6-cylinder 12-valve straight (inline) engine, OHV (overhead valve, I-head), 2783 cm3 / 169.8 cu in / 169.8 cu in, Wilson pre-selector 4-speed transmission, rear wheel drive

units: metric UK US

Basic (general) data

Marque (make)Armstrong SiddeleyIssued from1938
Model20Issued until
Serie20Number made
Model familyBody construction
Model codeBody designation
ManufacturerArmstrong SiddeleyCountryUK

Bodywork

Base platformNumber of doors4
Bodywork typesedan (saloon)Number of seats5
Bodywork designerCargo capacity (volume)
Passenger space (volume)Max. cargo capacity (volume)

Dimensions & Weight

Length4724 mm / 186.0 in / 186.0 inTotal (curb) weight
Width1803 mm / 71.0 in / 71.0 inDry weight
HeightLoad capacity
Wheelbase3048 mm / 120.0 in / 120.0 inGross (max.) weight
Track front1473 mm / 58.0 in / 58.0 inTowing weight
Track rear1473 mm / 58.0 in / 58.0 inWeight distribution (front)
Ground clearance162 mm / 6.4 in / 6.4 inFuel capacity64 l / 14.0 UK gal / 16.8 US gal
Length/wheelbase ratio1.55  

Aerodynamics

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

Engine

Engine CodeTotal number of cylinders6
Engine Typestraight (inline) Total number of valves12
Engine ManufacturerArmstrong-SiddeleyValves per cylinder2
Engine constructionBore75.0 mm / 2.95 in / 2.95 in
Fuelpetrol (gasoline)Stroke105.0 mm / 4.13 in / 4.13 in
Fuel detailsBore/Stroke ratio0.71
Fuel supplyEngine displacement2783 cm3 / 169.8 cu in / 169.8 cu in
Engine Main bearingsUnitary capacity463.83 cm3/cylinder / 28.305 cu in/cylinder / 28.305 cu in/cylinder
Cam DesignOHV (overhead valve, I-head)Compression ratio
SumpMax. output power at
AspirationnaturalMax. torque at
Compressor typeN/AMaximum rpm
IntercoolernoMax. net output (power at the wheels)
CoolantwaterSpecific output
Catalytic converternoSpecific torque

Transmission

Transmission typeWilson pre-selectorNumber of gears4
Wheel driverear wheel driveTop gear (drive) ratio1
  Final gear (drive) ratio4.7

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 frontIndependent, Semi-elliptic leaf springsSuspension rearLive axle, Semi-elliptic leaf springs
Wheels frontWheels rear
Tyres frontTyres rear
Brakes frontBrakes rear
Brake diameter frontBrake diameter rear
Brakes detailsBraked area

Technical specifications and performance data of Armstrong Siddeley 20

Infobox

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