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Fairthorpe EM Mk IV

(1969 model)

Brief specs of 1969 Fairthorpe EM Mk IV

2-door 2-seater drophead coupé (convertible coupé), petrol (gasoline) 4-cylinder 8-valve straight (inline) engine, OHV (overhead valve, I-head), 1296 cm3 / 79.1 cu in / 79.1 cu in, 55.9 kW / 75.0 hp / 75.0 hp @ 6000 rpm / 6000 rpm / 6000 rpm, 102.0 N·m / 75.2 lb·ft / 75.2 lb·ft @ 4000 rpm / 4000 rpm / 4000 rpm, manual 4-speed transmission, rear wheel drive

units: metric UK US

Basic (general) data

Marque (make)FairthorpeIssued from1969
ModelEM Mk IVIssued until
SerieEMNumber made
Model familyBody construction
Model codeBody designation
ManufacturerFairthorpeCountryUK

Bodywork

Base platformNumber of doors2
Bodywork typedrophead coupé (convertible coupé)Number of seats2
Bodywork designerCargo capacity (volume)
Passenger space (volume)Max. cargo capacity (volume)

Dimensions & Weight

Length3632 mm / 143.0 in / 143.0 inTotal (curb) weight490 kg / 1080 lb / 1080 lb
Width1473 mm / 58.0 in / 58.0 inDry weight
Height1168 mm / 46.0 in / 46.0 inLoad capacity
Wheelbase2134 mm / 84.0 in / 84.0 inGross (max.) weight
Track front1220 mm / 48.0 in / 48.0 inTowing weight
Track rear1220 mm / 48.0 in / 48.0 inWeight distribution (front)
Ground clearance102 mm / 4.0 in / 4.0 inFuel capacity41 l / 9.0 UK gal / 10.8 US gal
Length/wheelbase ratio1.7  

Aerodynamics

Drag coefficient (Cd, Cx, Cw)Frontal area (A)1.46 m2 / 15.7 sq ft / 15.7 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) Total number of valves8
Engine ManufacturerTriumphValves per cylinder2
Engine constructionBore73.7 mm / 2.90 in / 2.90 in
Fuelpetrol (gasoline)Stroke76.0 mm / 2.99 in / 2.99 in
Fuel detailsBore/Stroke ratio0.97
Fuel supply2 SU carbsEngine displacement1296 cm3 / 79.1 cu in / 79.1 cu in
Engine Main bearings3Unitary capacity324.00 cm3/cylinder / 19.772 cu in/cylinder / 19.772 cu in/cylinder
Cam DesignOHV (overhead valve, I-head)Compression ratio9.5 : 1
SumpMax. output power55.9 kW / 75.0 hp / 75.0 hp at 6000 rpm / 6000 rpm / 6000 rpm
AspirationnaturalMax. torque102.0 N·m / 75.2 lb·ft / 75.2 lb·ft at 4000 rpm / 4000 rpm / 4000 rpm
Compressor typeN/AMaximum rpm
IntercoolernoMax. net output (power at the wheels)22.4 kW / 30.0 hp / 30.0 hp (est.)
CoolantwaterSpecific output43.1 kW/l / 0.948 bhp/cu in / 0.948 bhp/cu in
Catalytic converternoSpecific torque78.7 N·m/l / 0.69 lb·ft/cu in / 0.69 lb·ft/cu in

Transmission

Transmission typemanualNumber of gears4
Wheel driverear wheel driveTop gear (drive) ratio1
  Final gear (drive) ratio4.11

Performance

Acceleration 0-50 mph (80 km/h)Top (maximal) speed
Acceleration 0-60 mph (97 km/h)Power-to-weight ratio153.1 kW/ton / 116.0 bhp/ton / 116.0 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
Steeringrack & pinionSteering details
Turns lock-to-lock4.5Turning circle7.0 m / 23.0 ft / 23.0 ft
Suspension frontIndependent, Wishbone (A-arm, control arm), Coil springs, Anti-roll (anti-sway) bar (ARB)Suspension rearLive axle, Coil springs
Wheels frontWheels rear
Tyres frontTyres rear
Brakes frontdiscBrakes reardrum
Brake diameter frontBrake diameter rear
Brakes detailsBraked area

Technical specifications and performance data of Fairthorpe EM Mk IV

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