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Armstrong Siddeley Sapphire 234

(1955 model)

Brief specs of 1955 Armstrong Siddeley Sapphire 234

4-door 5-seater sedan (saloon), petrol (gasoline) 4-cylinder 8-valve straight (inline) engine, OHV (overhead valve, I-head), 2290 cm3 / 139.7 cu in / 139.7 cu in, 89.5 kW / 120.0 hp / 120.0 hp @ 5000 rpm / 5000 rpm / 5000 rpm, 189.0 N·m / 139.4 lb·ft / 139.4 lb·ft @ 3500 rpm / 3500 rpm / 3500 rpm, manual 4-speed transmission, rear wheel drive, 155 km/h / 96 mph / 96 mph top speed

units: metric UK US

Basic (general) data

Marque (make)Armstrong SiddeleyIssued from1955
ModelSapphire 234Issued 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)5290 l / 186.81 cu ft / 186.81 cu ftMax. cargo capacity (volume)

Dimensions & Weight

Length4572 mm / 180.0 in / 180.0 inTotal (curb) weight1360 kg / 2998 lb / 2998 lb
Width1740 mm / 68.5 in / 68.5 inDry weight
Height1568 mm / 61.7 in / 61.7 inLoad capacity
Wheelbase2819 mm / 111.0 in / 111.0 inGross (max.) weight
Track front1400 mm / 55.1 in / 55.1 inTowing weight
Track rear1378 mm / 54.3 in / 54.3 inWeight distribution (front)
Ground clearanceFuel capacity72 l / 15.8 UK gal / 19.0 US gal
Length/wheelbase ratio1.62  

Aerodynamics

Drag coefficient (Cd, Cx, Cw)Frontal area (A)2.32 m2 / 25.0 sq ft / 25.0 sq ft (est.)
Aerodynamic coefficient (Cd×A)Aerodynamic resistance (Aero horse power) at 100 km/h (62 mph)

Engine

Engine CodeTotal number of cylinders4
Engine Typestraight (inline) (Inline, 6 cylinder)Total number of valves8
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 supply2 SU carbsEngine displacement2290 cm3 / 139.7 cu in / 139.7 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 ratio7.5 : 1
SumpMax. output power89.5 kW / 120.0 hp / 120.0 hp at 5000 rpm / 5000 rpm / 5000 rpm
AspirationnaturalMax. torque189.0 N·m / 139.4 lb·ft / 139.4 lb·ft at 3500 rpm / 3500 rpm / 3500 rpm
Compressor typeN/AMaximum rpm
IntercoolernoMax. net output (power at the wheels)12.1 kW / 16.2 hp / 16.2 hp (est.)
CoolantwaterSpecific output39.1 kW/l / 0.859 bhp/cu in / 0.859 bhp/cu in
Catalytic converternoSpecific torque82.5 N·m/l / 0.72 lb·ft/cu in / 0.72 lb·ft/cu in

Transmission

Transmission typemanualNumber of gears4
Wheel driverear wheel driveTop gear (drive) ratio0.77
  Final gear (drive) ratio4.54

Performance

Acceleration 0-50 mph (80 km/h)10.90 s / 10.90 s / 10.90 sTop (maximal) speed155 km/h / 96 mph / 96 mph
Acceleration 0-60 mph (97 km/h)Power-to-weight ratio88.2 kW/ton / 66.9 bhp/ton / 66.9 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 springsSuspension rearLive axle, Semi-elliptic leaf springs
Wheels frontWheels rear
Tyres frontTyres rear
Brakes frontdrumBrakes reardrum
Brake diameter frontBrake diameter rear
Brakes detailsBraked area

Technical specifications and performance data of Armstrong Siddeley Sapphire 234

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