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Calthorpe Minor 10/12

(1914 model)

Brief specs of 1914 Calthorpe Minor 10/12

petrol (gasoline) 4-cylinder 8-valve straight (inline) engine, side valves (flathead, L-block, L-head), 1087 cm3 / 66.3 cu in / 66.3 cu in, 18.6 kW / 24.9 hp / 24.9 hp @ 3300 rpm / 3300 rpm / 3300 rpm, manual 3-speed transmission, rear wheel drive

units: metric UK US

Basic (general) data

Marque (make)CalthorpeIssued from1914
ModelMinor 10/12Issued until
SerieMinorNumber 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

Length3200 mm / 126.0 in / 126.0 inTotal (curb) weight305 kg / 672 lb / 672 lb
WidthDry weight
HeightLoad capacity
Wheelbase2210 mm / 87.0 in / 87.0 inGross (max.) weight
Track front1118 mm / 44.0 in / 44.0 inTowing weight
Track rear1118 mm / 44.0 in / 44.0 inWeight distribution (front)
Ground clearanceFuel capacity
Length/wheelbase ratio1.45  


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 constructionBore62.0 mm / 2.44 in / 2.44 in
Fuelpetrol (gasoline)Stroke90.0 mm / 3.54 in / 3.54 in
Fuel detailsBore/Stroke ratio0.69
Fuel supply1 Ze carbEngine displacement1087 cm3 / 66.3 cu in / 66.3 cu in
Engine Main bearingsUnitary capacity271.75 cm3/cylinder / 16.583 cu in/cylinder / 16.583 cu in/cylinder
Cam Designside valves (flathead, L-block, L-head)Compression ratio
SumpMax. output power18.6 kW / 24.9 hp / 24.9 hp at 3300 rpm / 3300 rpm / 3300 rpm
AspirationnaturalMax. torque at
Compressor typeN/AMaximum rpm
IntercoolernoMax. net output (power at the wheels)7.4 kW / 10.0 hp / 10.0 hp (est.)
CoolantwaterSpecific output17.1 kW/l / 0.376 bhp/cu in / 0.376 bhp/cu in
Catalytic converternoSpecific torque


Transmission typemanualNumber of gears3
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 ratio82.0 kW/ton / 62.1 bhp/ton / 62.1 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


Engine locationfrontEngine alignmentlongitudinal
Steeringworm & sectorSteering details
Turns lock-to-lockTurning circle
Suspension frontSuspension rear
Wheels frontWheels rear
Tyres front700 x 85Tyres rear700 x 85
Brakes frontBrakes rear
Brake diameter frontBrake diameter rear
Brakes detailsBraked area

Technical specifications and performance data of Calthorpe Minor 10/12


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