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Arrol-Johnston 15.9

(1912 model)

Brief specs of 1912 Arrol-Johnston 15.9

petrol (gasoline) 4-cylinder 8-valve straight (inline) engine, side valves (flathead, L-block, L-head), 2815 cm3 / 171.8 cu in / 171.8 cu in, manual 4-speed transmission, rear wheel drive

units: metric UK US

Basic (general) data

Marque (make)Arrol-JohnstonIssued from1912
Model15.9Issued until
Serie15.9Number made
Model familyBody construction
Model codeBody designation


Base platformNumber of doors
Bodywork typeNumber of seats
Bodywork designerCargo capacity (volume)
Passenger space (volume)Max. cargo capacity (volume)

Dimensions & Weight

Length4039 mm / 159.0 in / 159.0 inTotal (curb) weight
Width1702 mm / 67.0 in / 67.0 inDry weight
HeightLoad capacity
Wheelbase3124 mm / 123.0 in / 123.0 inGross (max.) weight
Track front1422 mm / 56.0 in / 56.0 inTowing weight
Track rear1422 mm / 56.0 in / 56.0 inWeight distribution (front)
Ground clearance191 mm / 7.5 in / 7.5 inFuel capacity
Length/wheelbase ratio1.29  


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


Engine CodeTotal number of cylinders4
Engine Typestraight (inline) Total number of valves8
Engine ManufacturerValves per cylinder2
Engine constructionBore80.0 mm / 3.15 in / 3.15 in
Fuelpetrol (gasoline)Stroke140.0 mm / 5.51 in / 5.51 in
Fuel detailsBore/Stroke ratio0.57
Fuel supplyEngine displacement2815 cm3 / 171.8 cu in / 171.8 cu in
Engine Main bearingsUnitary capacity703.75 cm3/cylinder / 42.945 cu in/cylinder / 42.945 cu in/cylinder
Cam Designside valves (flathead, L-block, L-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 typemanualNumber of gears4
Wheel driverear wheel driveTop gear (drive) ratio
  Final gear (drive) ratio


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


Engine locationfrontEngine alignmentlongitudinal
SteeringSteering details
Turns lock-to-lockTurning circle
Suspension frontSuspension rear
Wheels frontWheels rear
Tyres front815 x 105Tyres rear815 x 105
Brakes frontBrakes rear
Brake diameter frontBrake diameter rear
Brakes detailsBraked area

Technical specifications and performance data of Arrol-Johnston 15.9


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