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Allard J1 3.9

(1951 model)

Brief specs of 1951 Allard J1 3.9

2-door 2-seater, petrol (gasoline) 8-cylinder 16-valve straight (inline) engine, 3917 cm3 / 239.0 cu in / 239.0 cu in, 74.0 kW / 99.2 hp / 99.2 hp @ 3800 rpm / 3800 rpm / 3800 rpm, 305.0 N·m / 225.0 lb·ft / 225.0 lb·ft @ 2500 rpm / 2500 rpm / 2500 rpm, manual 3-speed transmission, rear wheel drive

units: metric UK US

Basic (general) data

Marque (make)AllardIssued from1951
ModelJ1 3.9Issued until
SerieJ1Number made
Model familyBody construction
Model codeBody designation
ManufacturerAllardCountryUK

Bodywork

Base platformNumber of doors2
Bodywork typeNumber of seats2
Bodywork designerCargo capacity (volume)
Passenger space (volume)3590 l / 126.78 cu ft / 126.78 cu ftMax. cargo capacity (volume)

Dimensions & Weight

Length3690 mm / 145.3 in / 145.3 inTotal (curb) weight1146 kg / 2526 lb / 2526 lb
Width1480 mm / 58.3 in / 58.3 inDry weight
Height1510 mm / 59.4 in / 59.4 inLoad capacity
Wheelbase2440 mm / 96.1 in / 96.1 inGross (max.) weight
Track frontTowing weight
Track rearWeight distribution (front)
Ground clearanceFuel capacity113 l / 24.9 UK gal / 29.9 US gal
Length/wheelbase ratio1.51  

Aerodynamics

Drag coefficient (Cd, Cx, Cw)Frontal area (A)1.90 m2 / 20.4 sq ft / 20.4 sq ft (est.)
Aerodynamic coefficient (Cd×A)Aerodynamic resistance (Aero horse power) at 100 km/h (62 mph)

Engine

Engine CodeTotal number of cylinders8
Engine Typestraight (inline) (Inline, 8 cylinder)Total number of valves16
Engine ManufacturerValves per cylinder2
Engine constructionBore81.0 mm / 3.19 in / 3.19 in
Fuelpetrol (gasoline)Stroke95.3 mm / 3.75 in / 3.75 in
Fuel detailsBore/Stroke ratio0.85
Fuel supplyCarburettorEngine displacement3917 cm3 / 239.0 cu in / 239.0 cu in
Engine Main bearingsUnitary capacity491.08 cm3/cylinder / 29.968 cu in/cylinder / 29.968 cu in/cylinder
Cam DesignCompression ratio
SumpMax. output power74.0 kW / 99.2 hp / 99.2 hp at 3800 rpm / 3800 rpm / 3800 rpm
AspirationnaturalMax. torque305.0 N·m / 225.0 lb·ft / 225.0 lb·ft at 2500 rpm / 2500 rpm / 2500 rpm
Compressor typeMaximum rpm
IntercoolerMax. net output (power at the wheels)29.6 kW / 39.7 hp / 39.7 hp (est.)
CoolantSpecific output18.9 kW/l / 0.415 bhp/cu in / 0.415 bhp/cu in
Catalytic converterSpecific torque77.9 N·m/l / 0.68 lb·ft/cu in / 0.68 lb·ft/cu in

Transmission

Transmission typemanualNumber of gears3
Wheel driverear wheel driveTop gear (drive) ratio
  Final gear (drive) ratio

Performance

Acceleration 0-50 mph (80 km/h)Top (maximal) speed
Acceleration 0-60 mph (97 km/h)Power-to-weight ratio88.6 kW/ton / 67.1 bhp/ton / 67.1 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 frontSuspension rear
Wheels frontWheels rear
Tyres frontTyres rear
Brakes frontBrakes rear
Brake diameter frontBrake diameter rear
Brakes detailsBraked area

Technical specifications and performance data of Allard J1 3.9

Infobox

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