Not to be published until Wednesday 15th August 1973
MGB GT V8
TECHNICAL SPECIFICATIONS
ENGINE
| Capacity | - | 3528.08 cc |
| No. of cylinders | - | 8, 2 banks of 4 @ 90 degrees |
| Bore | - | 3.5 ins (88.9mm) |
| Stroke | - | 2.8 ins (71.12mm) |
| Compression ratio | - | 8.25:1 |
| BHP @ Rev/Min (DIN) | - | 137 @ 5,000 |
| Torque @ Rev/Min (DIN) | - | 193 lb ft @ 2,900 |
| Air Cleaner | - | Twin paper elements |
| Firing Order | - | 1, 8, 4, 3, 6, 5, 7, 2 |
| Crankcase Ventilation | - | Sealed breathing system |
| | |
FUEL SYSTEM
| Tank Capacity | - | 12 galls (54 litres) |
| Fuel Pump | - | SU electric |
| Fuel Filtration | - | Fuel filter on bulkhead |
| Grade of Fuel | - | 97 RON min. (4 star) |
| Location of Fuel Tank | - | Under luggage compartment floor |
| Carburetter type | - | Twin SU HIF6 |
| | |
TRANSMISSION
| Clutch Type | - | Borg & Beck diaphragm spring |
| Diameter of Plate | - | 9.5 ins. |
| Actuation | - | Hydraulically operated by pendant pedal |
| Gearbox Type | - | 4 speed all synchromesh, with reverse |
| Gearshift | - | Direct control centrally mounted on floor |
| | |
GEAR RATIOS
| Gear | Gearbox Ratio | Final Drive Ratio | Overall Ratio |
| 1st | 3.138 | 3.071 | 9.637 |
| 2nd | 1.974 | 3.071 | 6.062 |
| 3rd | 1.259 | 3.071 | 3.866 |
| 4th | 1.000 | 3.071 | 3.071 |
| Overdrive | 0.820 | 3.071 | 2.518 |
| Reverse | 2.819 | 3.071 | 8.657 |
| | | |
FINAL DRIVE
| Type | - | Open propeller shaft to rear axle |
| Universal Joints | - | Two Hardy Spicer needle roller UJs |
| Rear Axle | - | Hypoid. Three quarter floating. |
| | |
OVERDRIVE
| Type | - | On top gear, Laycock Type LH fitted |
| | between gearbox and propeller shaft |
| | |
LUBRICATION
| Type | - |
Pressure lubrication on main bearings,
big ends, camshaft bearings, hydraulic
tappets, connecting rods and rocker
shaft. Leak lubrication to push rods,
timing chain and sprockets, valve stems,
distributor drive. Splash feed to cylinder
walls, small ends. Oil mist to valves and
rockers. |
| Oil Pump | - | Gear type |
| Oil Pump Drive | - | Gear from camshaft |
| Pressure Relief Valve Setting | - | 33 lb/in2 |
| Filtration | - | Full flow |
| Oil Filter | - | Disposable unit |
| Location | - | RH side wing valance |
| Oil Cooler | - | 9 row |
| Capacity of Engine Oil | - | 9 pints, including filter |
| Gearbox | - | Splash feed gears operating in oil |
| Capacity of Gearbox Oil | - | 6.5 pints (dry fill, including OD) |
| | (90 EP oil), 6 pints refill including OD |
| Final Drive | - | Splash feed (crown wheel operation in oil) |
| Capacity of Final Drive | - | 1.8 pints (SAE90 Heavy Duty Oil) from dry. |
| | Refill 1.5 pints. |
| | |
PERFORMANCE (Figures obtained by Engineering)
| Gear | MPH | |
| 1st | 39 | |
| 2nd | 62 | |
| 3rd | 97 | |
| 4th | 121.8 | |
| | |
| Road speed per 1000 rpm | a) 4th gear | 23.4 mph |
| b) Overdrive | 28.5 mph |
| | |
| Acceleration (2 Up) |
| MPH | KPH | | TIME IN SECS |
| | | In top gear | In 2nd gear | In 3rd gear |
| 20-40 | 32-64 | 8.55 | 3.45 | 6.35 |
| 30-50 | 48-80 | 7.65 | 3.4 | 5.60 |
| 40-60 | 64-97 | 7.75 | 4.3 | 5.75 |
| 50-70 | 80-112 | 8.55 | - | 6.45 |
| | | | | |
| Through Gears |
| MPH | KPH | SECS |
| 0-30 | 0-48 | 3.0 |
| 0-40 | 0-64 | 4.6 |
| 0-50 | 0-80 | 6.5 |
| 0-60 | 0-97 | 8.25 |
| 0-70 | 0-112 | 12.0 |
| 0-80 | 0-129 | 15.2 |
| 0-90 | 0-144 | 20.05 |
| 0-100 | 0-160 | 26.55 |
| 0-110 | 0-176 | 38.30 |
| | | |
| Standing Quarter Mile | - | 16.45 |
| | |
FUEL CONSUMPTION
(Steady running on 20 miles of Motorway)
| MPH | MPG in 4th | In Overdrive |
| 30 | 33 | 34 |
| 40 | 32 | 34 |
| 50 | 30 | 32 |
| 60 | 27.5 | 30 |
| 70 | 25.6 | 27.5 |
| 80 | 21.90 | 24.5 |
| 90 | 19.0 | 21.25 |
| 100 | 16.9 | 20 |
| | |
SUSPENSION-FRONT
Independent with coil springs and lower wishbone mounted on a crossmember
assembly. Lever type dampers with double levers carry top end of swivel pin.
Anti-roll bar.
SUSPENSION-REAR
Tube type axle with three quarter floating drive shafts. Rubber mounted
semi-elliptic leaf springs. Spring shackles are fitted with rubber bushes.
Lever type dampers fitted.
BRAKES
| FRONT | | |
| Type | - | Lockheed hydraulic |
| | Hydraulically operated by pendant pedal |
| Description | - | Disc brakes with fixed caliper |
| Diameter of disc | - | 10.7 ins. |
| Diameter of wheel cylinder | - | 2.125 ins. |
| Swept frictional area/brakes | - | 3.19 ins.2 |
| Automatic adjustment | | |
| | |
| REAR | | |
| Description | - | Hydraulically operated drum brakes with |
| | leading and trailing shoes. |
| Diameter of drum | - | 10 ins. |
| Diameter of wheel cylinder | - | 0.8 ins. |
| Total Swept Area/Brake | - | 106.82 ins.2 |
| Shoe Width | - | 1.7 ins. |
| One brake adjuster per backplate | | |
| Area of Lining | - | 33.6 ins.2/brake |
| | |
| HANDBRAKE | - |
Mounted on right hand side of floor tunnel between seats.
Operated on rear wheels via single cable to compensator and
single cable to each brake backplate. |
| | |
STEERING
| Type | - | Rack and pinion with collapsible column |
| Ratio | - | 16.417:1 overall effective ratio |
| Steering column | - | Anti-penetration with universal joint |
| Steering wheel diameter | - | 15.5 ins. |
| Number of turns lock-to-lock | - | 2.93 |
| Steering box oil capacity | - | 8.0oz (Hypoid 90 or Hypoid 80) |
| Turning circle | - | Right Lock - 33 ft 1 in |
| | Left Lock - 34 ft 0 in |
| | |
BODY CHASSIS CONSTRUCTION
All steel unitary contstruction - two door, two seater, four light GT body with 'Lift up' tailgate.
WHEELS
| Type | - | Cast aluminum with chromed steel rims. |
| | Wheel center chrome finisher w/ MG motif. |
| Size | - | 5J |
| Fixing | - | 4 stud |
| | |
TYRES
| Type | - | Radial ply |
| Size | - | 175HR - 14 |
| | |
WEIGHT
COOLING SYSTEM
| Type | - | Closed pressurized system w/expansion tank |
| Pressure | - | 15 lb/in2 |
| Fan | - | Two thermostatically controlled |
| | Electrically operated plastic fans w/ 4 blades |
| Radiator | - | Cross-flow front mounted |
| - | 4 row 12 gills/inch Brass tubes, copper gills. |
| Capacity | - | 16 pints (including heater) |
| Thermostat | - | Operating at 82° C (home market) |
| - | Fan thermostat - 90° C |
| | |
ELECTRICAL CHARGING SYSTEM
| Type | - | 12V system, negative earth |
| Battery | - | Two 6V batteries connected in series |
| | (11 plates each battery) |
| | 67 amp hr at 20 hr rate |
| Voltage Control | - | Incorporated in alternator |
| Generator | - | AC Delco 43 amp alternator |
| | |
IGNITION
| Coil | - | 16C6 ballast type |
| Sparking plugs | - | Champion L92Y (0.035in gap) |
| Distributor | - | Lucas 35D8 with automatic advance and |
| | retard device |
| | |
LIGHTING
| Headlamps | - | Double dipping sealed beam |
| | 2 lamps 12V 75/50W |
| Sidelamps | - | 12V 5W |
| Flashing Indicators (front) | - | 12V 21W |
| Tail lights | - | 2 lamps 12V 5W |
| Stop lights | - | 2 lamps 12V 21W |
| Flashing indicators (rear) | - | 2 lamps 12V 21W |
| Rear number plate light | - | 2 lamps 12V 5W |
| Reversing lights | - | Two, automatically actuated 12V 21W |
| Hazard Warning Lights | - | 21W |
| Interior Courtesy Light | - | Mounted in centre console - switches |
| | on front doors. |
| Roof light at rear | - | Operated by tailgate |
| Instrument lighting | - | Green (controlled by rheostat switch) |
| | |
ANCILLARIES
| Windscreen wiper | - | Twin blade, self parking, two speed, |
| | matt black switches on LH column stalk |
| Windscreen washers | - | Electrically operated by LH stalk |
| Horn | - | Twin windtone - operated by horn push on |
| | wheel centre. |
| Starter Motor | - | Lucas 3M100 pre-engaged |
| Headlamp flasher | - | RH column stalk with headlamp dip |
| Ignition/Starter Switch | - | Incorporated in steering column lock |
| Warning Lights | - | Ignition, indicators, headlamp main beam |
| | and heated backlight |
| Gauges and Instruments | - | Water temp, fuel gauge, speedometer with |
| | odometer, oil pressure, impulse tachometer |
| | and trip mileage recorder. |
| Switches | - | Rocker type for fan, side and headlamps. |
| | Heated backlight. |
| - | Rheostat switch for green instrument |
| | illumination. |
| Heater | - | Fresh air type with two speed fan and face |
| | level ventilation. |
| Cigar lighter | - | Mounted on console. |
| Column stalks | - | LH: windscreen washers, two speed wipers, |
| | overdrive control. |
| - | RH: indicators, headlamp flash, main beam |
| | |
INTERIOR BODY FINISH
| Type of Windows | - | Front wind-down and opening quarter lights |
| - | Rear opening rear side windows |
| Type of Window Winders | - | Safety plastic regulator handles (manual) |
| Type of Door Handles | - | Recessed safety type |
| Type of Door Lock | - | Anti-burst |
| Seating layout - front | - | Two rake adjusting front seats with break |
| | back catches |
| Seating layout - rear | - | Occasional folding (for larger luggage area) |
| Glovebox | - | Passenger side - lockable, also hinged |
| | centre arm rest |
| Driving mirror | - | Framed safety dipping rear view mirror |
| Floor covering | - | Rubber mats of floor |
| - | Carpets over gearbox tunnel |
| Luggage compartment cover | - | Carpet |
| Sunvisors | - | Two (vanity mirror passenger side) |
| Seat belt mounting | - | Front seats |
| Seat belts | - | Inertia type (front only) |
| Ashtrays | - | Front mounted centrally in front of |
| | centre arm rest |
| Sundym glass all around | | |
| Headlining/trim | - | Unsupported grey PVC |
| Upholstery | - | Full width nylon seat faces |
| Arm rest | - | Hinged between front seats |
| Steering wheel | - | Black vynyde rimmed alloy with |
| | imitation slots in spokes |
| Arm rests/door pulls | - | fitted to each door |
| Map pocket | - | Mounted passenger-side footwell |
| Gear Lever Knob | - | Simulated leather with gearchange pattern |
| Gear Lever Gaiter | - | Leathercloth |
| Handbrake Grip | | |
| Head Restraints on Seats | | |
| Heated Backlight | | |
| Face Level Vents | - | Directional vane type at centre of fascia |
| | |
EXTERIOR BODY FINISH
| Bonnet opened by | - | Interior release |
| Bonnet supported by | - | Telescopic stay |
| Tailgate | - | Lift-up supported by spring assistors |
| Tailgate lock | - | Press button opened with key - slam type |
| Spare wheel | - | Housed in luggage compartment |
| Door handles | - | lock on each front door |
| Bumpers | - | Full width with rubber faced overriders |
| | front and rear. |
| Chrome exhaust pipe trim | | |
| Grille | - | Black ABS injection moulded |
| Badges | - | Traditional MG badge mounted on central |
| | grille bar. |
| - | "MG" motif with "BGT" mounted on right |
| | hand side of tailgate. |
| - | British Leyland house badge mounted on |
| | passenger side front wing. |
| - | Distinctive "V8" badge for grille, tailgate, |
| | and passenger side front wing. |
| Chrome side strip full length | | |
| Exterior mirrors | - | Two on doors |
| Tools | - | Toolbag, jack, wheelbrace |
| Laminated windscreen | - | |
| | |
DIMENSIONS
| Height (unladen) | - | 49.96" |
| Width | - | 59.94" |
| Length | - | 154.75" |
| Ground Clearance (laden) | - | 4.25" |
| Track - front | - | 49" |
| Track - rear | - | 49.25 |
| Wheelbase | - | 91.125" |
| Cubic capacity of luggage compartment | - | 9.6 ft3 |
| | |
VEHICLE WEIGHTS
| Max. allowable front axle weight | - | 1279 lbs |
| Max. allowable rear axle weight | - | 1594 lbs |
| * Net Vehicle dry weight | - | 2339 lbs |
| Net Vehicle Weight Kerbside | - | 2427 lbs |
| (including fuel, tools, oil, and water) | | |
| Payload | - | 450 lbs |
| Max towing weight | | 1680 lbs |
| Max roof rack load | | 50 lbs |
| | |
* with spare wheel, tool kit and oil, less petrol and water.
OPTIONAL EXTRAS
OPTIONAL EXTRAS FOR EXPORT
The performance and fuel consumption figures, specifications and detailed
dimensions in these Press Releases are taken from pre-production vehicles
and are subject to the usual variances which can occur in volume production.
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