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Triumph Spitfire IV

(1972 model)

Brief specs of 1972 Triumph Spitfire 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, 45.5 kW / 61.0 hp / 61.0 hp @ 5500 rpm / 5500 rpm / 5500 rpm, 92.0 N·m / 67.9 lb·ft / 67.9 lb·ft @ 2900 rpm / 2900 rpm / 2900 rpm, manual 4-speed transmission, rear wheel drive, 156 km/h / 97 mph / 97 mph top speed

units: metric UK US

Basic (general) data

Marque (make)TriumphIssued from1972
ModelSpitfire IVIssued until
SerieSpitfireNumber made
Model familyBody construction
Model codeBody designation
ManufacturerTriumphCountryUK

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

Length3786 mm / 149.1 in / 149.1 inTotal (curb) weight734 kg / 1618 lb / 1618 lb
Width1488 mm / 58.6 in / 58.6 inDry weight
Height1125 mm / 44.3 in / 44.3 inLoad capacity
Wheelbase2110 mm / 83.1 in / 83.1 inGross (max.) weight
Track front1245 mm / 49.0 in / 49.0 inTowing weight
Track rear1220 mm / 48.0 in / 48.0 inWeight distribution (front)56.0 % / 56.0 % / 56.0 %
Ground clearance127 mm / 5.0 in / 5.0 inFuel capacity38 l / 8.4 UK gal / 10.0 US gal
Length/wheelbase ratio1.79  

Aerodynamics

Drag coefficient (Cd, Cx, Cw)Frontal area (A)1.42 m2 / 15.3 sq ft / 15.3 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 ratio9.0 : 1
SumpMax. output power45.5 kW / 61.0 hp / 61.0 hp at 5500 rpm / 5500 rpm / 5500 rpm
AspirationnaturalMax. torque92.0 N·m / 67.9 lb·ft / 67.9 lb·ft at 2900 rpm / 2900 rpm / 2900 rpm
Compressor typeN/AMaximum rpm
IntercoolernoMax. net output (power at the wheels)7.4 kW / 10.0 hp / 10.0 hp (est.)
CoolantwaterSpecific output35.1 kW/l / 0.772 bhp/cu in / 0.772 bhp/cu in
Catalytic converternoSpecific torque71.0 N·m/l / 0.62 lb·ft/cu in / 0.62 lb·ft/cu in

Transmission

Transmission typemanualNumber of gears4
Wheel driverear wheel driveTop gear (drive) ratio1
  Final gear (drive) ratio3.89

Performance

Acceleration 0-50 mph (80 km/h)10.00 s / 10.00 s / 10.00 sTop (maximal) speed156 km/h / 97 mph / 97 mph
Acceleration 0-60 mph (97 km/h)Power-to-weight ratio83.1 kW/ton / 63.0 bhp/ton / 63.0 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-lock3.75Turning circle
Suspension frontIndependent, Wishbone (A-arm, control arm), Coil springs, Anti-roll (anti-sway) bar (ARB)Suspension rearIndependent, Swinging semi-axle, Transverse leaf spring
Wheels frontWheels rear
Tyres frontTyres rear
Brakes frontdiscBrakes reardrum
Brake diameter frontBrake diameter rear
Brakes detailsBraked area

Technical specifications and performance data of Triumph Spitfire IV

Infobox

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