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MG MGB

(1974 model)

Brief specs of 1974 MG MGB

2-door 2-seater drophead coupé (convertible coupé), petrol (gasoline) 4-cylinder 8-valve straight (inline) engine, OHV (overhead valve, I-head), 1798 cm3 / 109.7 cu in / 109.7 cu in, 72.3 kW / 97.0 hp / 97.0 hp @ 5500 rpm / 5500 rpm / 5500 rpm, 141.0 N·m / 104.0 lb·ft / 104.0 lb·ft @ 2500 rpm / 2500 rpm / 2500 rpm, manual with overdrive 4-speed transmission, rear wheel drive

units: metric UK US

Basic (general) data

Marque (make)MGIssued from1974
ModelMGBIssued until
SerieMGBNumber made
Model familyBody construction
Model codeBody designation
ManufacturerMGCountryUK

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

Length4021 mm / 158.3 in / 158.3 inTotal (curb) weight971 kg / 2141 lb / 2141 lb
Width1570 mm / 61.8 in / 61.8 inDry weight
Height1295 mm / 51.0 in / 51.0 inLoad capacity
Wheelbase2311 mm / 91.0 in / 91.0 inGross (max.) weight
Track front1245 mm / 49.0 in / 49.0 inTowing weight
Track rear1252 mm / 49.3 in / 49.3 inWeight distribution (front)
Ground clearanceFuel capacity50 l / 11.0 UK gal / 13.2 US gal
Length/wheelbase ratio1.74  

Aerodynamics

Drag coefficient (Cd, Cx, Cw)Frontal area (A)1.73 m2 / 18.6 sq ft / 18.6 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 ManufacturerAustinValves per cylinder2
Engine constructionBore80.3 mm / 3.16 in / 3.16 in
Fuelpetrol (gasoline)Stroke88.9 mm / 3.50 in / 3.50 in
Fuel detailsBore/Stroke ratio0.9
Fuel supply2 SU carbsEngine displacement1798 cm3 / 109.7 cu in / 109.7 cu in
Engine Main bearingsUnitary capacity449.50 cm3/cylinder / 27.430 cu in/cylinder / 27.430 cu in/cylinder
Cam DesignOHV (overhead valve, I-head)Compression ratio9.0 : 1
SumpMax. output power72.3 kW / 97.0 hp / 97.0 hp at 5500 rpm / 5500 rpm / 5500 rpm
AspirationnaturalMax. torque141.0 N·m / 104.0 lb·ft / 104.0 lb·ft at 2500 rpm / 2500 rpm / 2500 rpm
Compressor typeN/AMaximum rpm
IntercoolernoMax. net output (power at the wheels)28.9 kW / 38.8 hp / 38.8 hp (est.)
CoolantwaterSpecific output40.2 kW/l / 0.884 bhp/cu in / 0.884 bhp/cu in
Catalytic converternoSpecific torque78.4 N·m/l / 0.69 lb·ft/cu in / 0.69 lb·ft/cu in

Transmission

Transmission typemanual with overdriveNumber of gears4
Wheel driverear wheel driveTop gear (drive) ratio0.82
  Final gear (drive) ratio3.91

Performance

Acceleration 0-50 mph (80 km/h)Top (maximal) speed
Acceleration 0-60 mph (97 km/h)Power-to-weight ratio99.9 kW/ton / 75.7 bhp/ton / 75.7 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-lockTurning circle
Suspension frontIndependent, Wishbone (A-arm, control arm), Coil springsSuspension rearLive axle, Semi-elliptic leaf springs
Wheels frontWheels rear
Tyres frontTyres rear
Brakes frontdiscBrakes reardrum
Brake diameter frontBrake diameter rear
Brakes detailsservo-assistedBraked area

Technical specifications and performance data of MG MGB

Infobox

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