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Armstrong Siddeley Sapphire 346

(1953 model)

Brief specs of 1953 Armstrong Siddeley Sapphire 346

4-door 5-seater sedan (saloon), petrol (gasoline) 6-cylinder 12-valve straight (inline) engine, OHV (overhead valve, I-head), 3435 cm3 / 209.6 cu in / 209.6 cu in, 93.2 kW / 125.0 hp / 125.0 hp @ 4400 rpm / 4400 rpm / 4400 rpm, 239.0 N·m / 176.3 lb·ft / 176.3 lb·ft @ 1000 rpm / 1000 rpm / 1000 rpm, manual 4-speed transmission, rear wheel drive, 146 km/h / 91 mph / 91 mph top speed

units: metric UK US

Basic (general) data

Marque (make)Armstrong SiddeleyIssued from1953
ModelSapphire 346Issued until
SerieSapphireNumber 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

Length4902 mm / 193.0 in / 193.0 inTotal (curb) weight1575 kg / 3472 lb / 3472 lb
Width1830 mm / 72.0 in / 72.0 inDry weight
Height1600 mm / 63.0 in / 63.0 inLoad capacity
Wheelbase2896 mm / 114.0 in / 114.0 inGross (max.) weight
Track front1438 mm / 56.6 in / 56.6 inTowing weight
Track rear1461 mm / 57.5 in / 57.5 inWeight distribution (front)50.8 % / 50.8 % / 50.8 %
Ground clearanceFuel capacity
Length/wheelbase ratio1.69  

Aerodynamics

Drag coefficient (Cd, Cx, Cw)Frontal area (A)2.32 m2 / 25.0 sq ft / 25.0 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) Total number of valves12
Engine ManufacturerValves per cylinder2
Engine constructionBore90.0 mm / 3.54 in / 3.54 in
Fuelpetrol (gasoline)Stroke90.0 mm / 3.54 in / 3.54 in
Fuel detailsBore/Stroke ratio1
Fuel supply1 St carbEngine displacement3435 cm3 / 209.6 cu in / 209.6 cu in
Engine Main bearingsUnitary capacity572.50 cm3/cylinder / 34.936 cu in/cylinder / 34.936 cu in/cylinder
Cam DesignOHV (overhead valve, I-head)Compression ratio7.0 : 1
SumpMax. output power93.2 kW / 125.0 hp / 125.0 hp at 4400 rpm / 4400 rpm / 4400 rpm
AspirationnaturalMax. torque239.0 N·m / 176.3 lb·ft / 176.3 lb·ft at 1000 rpm / 1000 rpm / 1000 rpm
Compressor typeN/AMaximum rpm
IntercoolernoMax. net output (power at the wheels)43.3 kW / 58.0 hp / 58.0 hp (est.)
CoolantwaterSpecific output27.1 kW/l / 0.596 bhp/cu in / 0.596 bhp/cu in
Catalytic converternoSpecific torque69.6 N·m/l / 0.61 lb·ft/cu in / 0.61 lb·ft/cu in

Transmission

Transmission typemanualNumber of gears4
Wheel driverear wheel driveTop gear (drive) ratio1
  Final gear (drive) ratio4.09

Performance

Acceleration 0-50 mph (80 km/h)10.10 s / 10.10 s / 10.10 sTop (maximal) speed146 km/h / 91 mph / 91 mph
Acceleration 0-60 mph (97 km/h)15.50 s / 15.50 s / 15.50 sPower-to-weight ratio79.4 kW/ton / 60.1 bhp/ton / 60.1 bhp/ton
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 springs, Wishbone (A-arm, control arm)Suspension 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 Sapphire 346

Infobox

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