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MG MGB GT

(1977 model)

Brief specs of 1977 MG MGB GT

2-door 2+2-seater fixed-head coupé, petrol (gasoline) 4-cylinder 8-valve straight (inline) engine, OHV (overhead valve, I-head), 1799 cm3 / 109.8 cu in / 109.8 cu in, 62.6 kW / 83.9 hp / 83.9 hp @ 5500 rpm / 5500 rpm / 5500 rpm, 143.0 N·m / 105.5 lb·ft / 105.5 lb·ft @ 2500 rpm / 2500 rpm / 2500 rpm, manual with overdrive 4-speed transmission, rear wheel drive, 159 km/h / 99 mph / 99 mph top speed

units: metric UK US

Basic (general) data

Marque (make)MGIssued from1977
ModelMGB GTIssued until
SerieMGBNumber made
Model familyBody construction
Model codeBody designation
ManufacturerMGCountryUK

Bodywork

Base platformNumber of doors2
Bodywork typefixed-head coupéNumber of seats2+2
Bodywork designerCargo capacity (volume)
Passenger space (volume)Max. cargo capacity (volume)

Dimensions & Weight

Length4020 mm / 158.3 in / 158.3 inTotal (curb) weight1108 kg / 2443 lb / 2443 lb
Width1568 mm / 61.7 in / 61.7 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 rear1251 mm / 49.3 in / 49.3 inWeight distribution (front)52.0 % / 52.0 % / 52.0 %
Ground clearance127 mm / 5.0 in / 5.0 inFuel 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 HIF4 carbsEngine displacement1799 cm3 / 109.8 cu in / 109.8 cu in
Engine Main bearings5Unitary capacity449.75 cm3/cylinder / 27.445 cu in/cylinder / 27.445 cu in/cylinder
Cam DesignOHV (overhead valve, I-head)Compression ratio9.0 : 1
SumpMax. output power62.6 kW / 83.9 hp / 83.9 hp at 5500 rpm / 5500 rpm / 5500 rpm
AspirationnaturalMax. torque143.0 N·m / 105.5 lb·ft / 105.5 lb·ft at 2500 rpm / 2500 rpm / 2500 rpm
Compressor typeN/AMaximum rpm
IntercoolernoMax. net output (power at the wheels)26.9 kW / 36.1 hp / 36.1 hp (est.)
CoolantwaterSpecific output34.8 kW/l / 0.765 bhp/cu in / 0.765 bhp/cu in
Catalytic converternoSpecific torque79.5 N·m/l / 0.70 lb·ft/cu in / 0.70 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)9.30 s / 9.30 s / 9.30 sTop (maximal) speed159 km/h / 99 mph / 99 mph
Acceleration 0-60 mph (97 km/h)14.00 s / 14.00 s / 14.00 sPower-to-weight ratio75.8 kW/ton / 57.4 bhp/ton / 57.4 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 time19.10 s / 19.10 s / 19.10 s (top 70 km/h / 44 mph / 44 mph)Fuel consumption, Euro
Standing kilometer time36.40 s / 36.40 s / 36.40 s CO2 emissions
  Range

Chassis

Engine locationfrontEngine alignmentlongitudinal
Steeringrack & pinionSteering details
Turns lock-to-lockTurning circle10.4 m / 34.1 ft / 34.1 ft
Suspension frontIndependent, Coil springs, Wishbone (A-arm, control arm)Suspension rearLive axle, Semi-elliptic leaf springs
Wheels frontWheels rear
Tyres frontPirelli Cinturato 165 SR 14Tyres rearPirelli Cinturato 165 SR 14
Brakes frontdiscBrakes reardrum
Brake diameter front273 mm / 10.7 in / 10.7 inBrake diameter rear254 mm / 10.0 in / 10.0 in
Brakes detailsservo-assistedBraked area

Technical specifications and performance data of MG MGB GT

Infobox

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