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Car Back Catalogue | MG

1973 MGB

Brochure | US
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The 1973 MG MGB. An incomparable blend of performance and handling.

That's the legacy handed down intact from the 1973 MGB's class predecessors. The long and lean look - the MGB for 1973. Mag-style wheels with radial ply tires are standard, the brushed aluminum trim rims optional. In front, MG-TC that started it all. In back, the contemporary MG that carries the tradition forward. The top goes up when he weather comes down. Beautifully fitted and functional. Rack and pinion steering is the hallmark of a true sports car as is complete instrumentation including electric tachometer, speedometer with trip odometer, oil pressure, water temperature and fuel gauges. The MGB's earned its stripes and they're yours as an optional feature. Stop confidently with 10.75-inch front disc brakes. The MGB cuts through the wind with its aerodynamic design. The MGB is powered by a 1798 c.c. overhead valve four with twin S.U. carburetors, proven by over a decade of racing experience. Ochre, a new interior color, is standard with Black Tulip. Teal Blue and Green Mallard. A solid-stale AM or AM/FM radio is optional. The pattern on the new shift knob says it all - four speed all synchromesh transmission. Headquarters for the action: reclining bucket seats, fresh air vents, center console and lockable glove box. Navy interior is standard with Damask Red, Blaze, Harvest Gold, Limeflower, Glacier White and Bronze Yellow. Locking trunk with automatic lid support and interior courtesy light.

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1973 MG MGB Performance Highlights.


Horsepower @5,350 rpm

78.5

Max Speed (mph)

102.9

0-60 mph (sec)

13.7

Sports car history in America starts with the MG marque. From East to West, the challenges of twisting country lanes and cliff-hanging roads were met and conquered by the classic MG-TC. And the spirited performance that characterized the TC remains intact in the 1973 MG MGB. You still experience the quick response. The built-in flexibility. And the comfortable sense of sureness and control. That's what the MG-TC was all about. That's what the 1973 MGB is all about. And that's why it is the reigning SCCA Class E National Champion.

MG long ago established the criteria of what makes a sports car go: uncompromised performance and quick handling. And today, as the SCCA National Champion in its class; the MGB maintains its lead.

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1973 MG MGB Engine Specification

4-cylinder, in-line, overhead valve. 5-bearing counter-balanced crankshaft. Exhaust and evaporative emission-control.

Compression Ratio 8.0:1
Bore 3.16in
Bore 3.5in
Displacement 1798cc
Horsepower (SAE) 78.5 bhp @5,350 rpm
Torque (SAE) 94 lb/ft @3,000 rpm
Carburetion Twin 1.5in SU HIF 4 semi-downdraght
Fuel Pump High Pressure SU Electric
Fuel Tank Capacity 14 gallons

1973 MG MGB Transmission Specification

Four-speed all synchromesh with optional electrically controlled overdrive for third and fourth gears.

Clutch Diaphram type Borg & Beck 8 in with hydraulic actuation.
Rear Axle Three-quarter floating with hypoid final reduction gears.
Ratio 3.909:1
Overall gear ratios Standard Overdrive
Reverse 12.99:1 -
First 13.46:1 -
Second 8.47:1 -
Third 5.40:1 4.43:1
Fourth 3.91:1 3.20:1

1973 MG MGB Transmission Specification

Direct rack and pinion. Steering Wheel: 15.5 in. diameter alloy spoke, bound rim. Energy-absorbing steering column.

1973 MG MGB Suspension Specification

Four-speed all synchromesh with optional electrically controlled overdrive for third and fourth gears.

Front Independent, coll sorings and wishbone-type links with hydraulic shock absorbers and anti-roll bar.
Rear Semi-elliptic springs with hydraulic shock absorbers.

1973 MG MGB Brake Specification

Dual hydraulic braking systems.

Front 10.75in diameter disc brakes.
Rear 10in diameter drum brakes.

1973 MG MGB Wheel Specification

Roadstyle wheels, 14in diameter, fitted with 155 x 14 radial ply tires.

1973 MG MGB Performance Specification

Four-speed all synchromesh with optional electrically controlled overdrive for third and fourth gears.

Max Speed 102.9 mph
Acceleration 0-60 mph - 13.7 sec.
Standard quarter mile 19.0 sec
Road speed at 1,000 rpm in top gear. Standard gearbox 18 mph
Road speed at 1,000 rpm in top gear. Overdrive gearbox 22 mph

1973 MG MGB Electrical Specification

Negative ground 12v system. Twin 6-volt batteries mounted in balanced position. 60 amp/hr. Alternator with solid-state regulator. Electric 3-blade winshield wiper system. 2 speed. Electric windshield washers. Twin backup lights. Twin windtone horns controlled in centre steering wheel. Emergency flashing warning lights. Heater/defroster with high-speed blower and face-level fresh-air ventilation.

1973 MG MGB Instrument Specification

Speedometer with trip odometer. Electric tachometer, oil pressure, water temperature and fuel guages. Ignition, brake pressure, and high beam warning lights. Map reading, side door-operated courtesy light. Manual choke. All instruments and switches set in no-glare, padded dash, Rheodtab-type panel light switch.

1973 MG MGB Body Specification

Steel mono-construction. Locking trunk with automatic lid support. Automatic trunk light. Curved laminated windshield. Full positive anti-burst door latches. Roll-up windows and hinged front vents. Waterproof, floding top. Mirrors: exterior adjustable; interior adjustable day-night type. Lighted side markers front and rear. Rubber insert bumper overriders front and rear.

1973 MG MGB Interior Specification

Padded sunvisors. Reclining washable ambia bucket seats with adjustable head restraints. Safety 3-point seat belts. Centre console. Cigarette lighter and ashtray. Map pocket. lockable glove box. Fitted carpeting with rubber floor mats. Sill kick plates. Gearshif gaiter.

1973 MG MGB Optional Equipment and Accessories

Whitehall radial-ply tires. Dunlop 60-spoke centre-lock wire wheels. Wheel trim rims. Overdrive. Removable hard-top. Tonneau cover. Solid-state AM or AM/FM radio. Electric clock. Luggage rack (ski adapters available). Chrome plated grille guard. Striping kit. Wood gearshift knob, rubber floor mats, and a full range of other sports car accessories. Optional Racing Equipment: a full line of approved competition parts.

1973 MG MGB Dimension Specification

Front seat head room 37"
Front seat cushion depth 19"
Front seat squab height above cushion 21"
Front seat cushion height above floor 9"
Steering wheel to squab max 22 1/2"
Steering wheel to squab min 14 1/2"
Steering wheel to cushion 6 1/2"
Front seat leg reach max 46"
Front seat leg reach min 36 1/2"
Trunk height 16 1/2"
Trunk depth 29 1/2"
Trunk width 57"
Front seat cushion width individual 18"
Front seat cushion width overall 44"
Width between front doors max 50 1/2"
Shoulder width over front seat 46"
Wheelbase 91"
Overall height 49 1/2"
Overall width 59 1/2"
Overall length with over-riders 153"
Front door entry width 30"
Track at front 49 1/2"
Track at rear 49 1/2"
Turning circle 32 ft
Ground clearance 5"
Weight (approx) 1920 lb
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