1960s 1970s
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Technical
  • Austin 3-Litre Technical details and specifications (1968-1971)

    ENGINE
    location front
    4 stroke; cylinders: 6, in line
    bore and stroke: 3.28 x 3.50 in, 83.4 x 88.9 mm
    engine capacity: 177.69 cu in, 2,912 cu cm
    compression ratio: 8.2
    cylinder block: cast iron
    cylinder head: cast iron
    crankshaft bearings: 7
    valves: 2 per cylinder, overhead, push-rods and rockers
    camshafts: 1, side
    lubrication: eccentric pump, full flow filter
    carburation: 2 SU type HS 6 horizontal carburettors
    fuel feed: mechanical pump
    cooling system : water


    TRANSMISSION
    driving wheels: rear
    clutch: single dry plate (diaphragm), hydraulically controlled
    gearbox: mechanical; gears: 4 + reverse
    synchromesh 2nd, 3rd, 4th
    gearbox ratios: 1st 3.435, 2nd 2.169, 3rd 1.381, 4th 1
    (option) Borg-Warner 35 automatic gearbox, 3 ratios (1st 2.390, 2nd 1.450, 3rd 1 rev 2.090),
    (option) overdrive
    gear lever location: central
    final drive: hypoid bevel
    axle ratios: 3.910,3.560

    CHASSIS
    type integral
    front suspension: independent, wishbones, hydrolastic (liquid) rubber cone springs, hydraulic connecting pipes to rear wheels
    rear suspension: independent, swinging trailing arms, hydrolastic (liquid) rubber cone springs, hydraulic connecting pipes to front wheels, automatic levelling control.

    STEERING
    rack-and-pinion,servo
    turns of steering wheel lock to lock: 3.94
    turning circle (between walls): 37.5 m

    BRAKES
    front disc (diameter 10.40 in, 264 mm), rear drum, servo
    brake area rubbed by linings: front 224 sq in, 1,444.80 sq cm
    brake area rubbed by linings: rear 127.25 sq in, 820.76 sq cm
    brake area rubbed by linings: total 351.25 sq in, 2,265,56 sq cm.

    ELECTRICAL EQUIPMENT
    voltage: 12 V
    battery: 70 Ah
    generator type: alternator, 45 Ah
    ignition distributor: Lucas

    DIMENSIONS AND WEIGHT
    wheel base: 114.50 in, mm
    front track: 23.25 in, 1,429 mm
    rear track: 56 in, 1,422 mm
    overall length: 185.65 in, 4,716 mm
    overall width: 66.75 in, 1,695 mm
    overall height: 56.75 in, 1 ,441 mm
    ground clearance: 50 in, 165 mm
    dry weight: 3,304 1b, 1-499 kg

    © Motor car History

Service
  • Austin 3-Litre Maintenance and Service Guide (1968-1971)

    Fuel: 97 oct petrol
    Engine oil change: 12 imp pt. 14.37 US pt, 6.8 1, SAE 30, change every 6,000 miles, 9,700 km
    Total lubricating system capacity: 13.50 imp pt, 16.28 US pt
    Gearbox oil: 5 imp pt, 10.57 US pt, 2.8 1, SAE 30, change every 6,000 miles, 9,700 km
    Gearbox oil auto: 8 imp pt, 9.51 US pt, 4.5 1,
    Final drive oil: 2.50 imp pt, 5.28 US pt, 1.4 1, SAE 90, change every 6,000 miles, 9,700 km
    Cooling system capacity: 19 imp pt, 22.83 US pt
    Greasing: none
    Tappet clearances: inlet 0.012 in, 0.30 mm, exhaust 0.012 in, 0.30 mm
    Valve timing : inlet opens 16° before tdc and closes 56° after bdc, exhaust opens 51° before bdc and closes 21° after tdc
    Normal tyre pressure: front 28 psi, 2 atm, rear 21 psi, 1.5 atm.
    Width of rims: 5"
    Tyres: 185 x 14
    Fuel tank capacity: 15.5 imp gal, 18.5 US gal
    Carrying capacity: 1,058 1b, 480 kg

    © Motor car History

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Austin 3-Litre

 1968 to 1971
Austin 3-Litre motor car history
Overview
Manufacturer British Leyland
Production 1968–1971 9,992 made
Body and chassis
Class full-size car
Body style 4-door saloon 5-door estate (Crayford Conversion)
Powertrain
Engine 2912 cc C-Series Straight-6
Dimensions
Wheelbase 114.5 in (2,908 mm)
Length 185.75 in (4,718 mm)
Width 67 inches (1695 mm)
Height 56.6 in (1,438 mm)
Curb weight 3,304 lb (1,499 kg)
Chronology
Predecessor Austin A110
Successor Austin 2200

 

The Austin 3-Litre was a British saloon car introduced by British Leyland at the London Motor Show in 1967. It became apparent that BMC were not geared up to producing the car: few or none seem to have been sold that year, but by July 1968 it was reported that the cars had begun to leave the factory. By that time the square headlights seen at the 1967 motor show had been replaced by conventional round twin headlamp units, and by the time of the October 1968 show the car had also acquired front quarter lights. In July 1968, with cars beginning to emerge from the plant, the manufacturers were asked to detail improvements reportedly implemented since the car's "launch" the previous October. Mention was made of orifice modifications to hydraulic valves in the rear suspension, and it was stated that there was a "new" final drive ratio of 3.9:1, though this was actually the same final drive ratio included in the launch information the previous October.

Austin 3-Litre side view

Codenamed ADO61, the car was intended to be BMC's offering in the 3-litre executive class and was originally designed in the early 1960s, before the British Leyland era. Unlike the visually similar (but smaller) front-wheel drive ADO17 range, the 125 bhp 3-litre engine (a 7-bearing modification of the BMC C-Series with twin SU carburettors) drove the rear wheels through a conventional 4-speed gearbox. The car used Hydrolastic suspension with self-levelling hydraulic rams at the rear and was praised for its excellent ride and handling. Alec Issigonis, who designed the front-wheel drive cars, had no part in the 3-Litre, which he was reportedly keen to point out.

  • PERFORMANCE:3-litre Saloon
  • Engine capacity: 177.69 cu in, 2,912 cu cm
  • Fuel consumption: 21.7 m/imp gal, 18.1 mlUS gal, 13 1 x 100 km
  • Max speed: 100 mph, 161 km/h
  • Max power (SAE): 125 hp at 4,750 rpm
  • Max torque (SAE): 157 1b ft, 21.7 kg m at 2,500 rpm
  • Max engine rpm: 5,700
  • Specific power: 42.9 hp/l
  • Power-weight ratio: 26.5 lb/hp, 12 kg/hp

To cater for its intended market the interior was luxurious, featuring wood veneers and cloth headlining (but leather upholstery was not available, being replaced with a good-quality vinyl) and the boot was longer than that of the 1800, contributing to an overall length of 186 inches (4,700 mm) (the 1800 was 167 inches (4,200 mm) long).

Austin 3-Litre interior dash view

Luxurious Wolseley and Vanden Plas 3-litre versions both reached prototype stage, but went no further. A small number of estate models were built however, converted by Crayford. In the early days of British Leyland proposals for a Rover-branded version were considered to replace the Rover P5 3-Litre but these did not progress beyond the drawing board.

Sales were very poor. The standard version had been withdrawn by 1969 while the de luxe version soldiered on until the model was discontinued completely in May 1971, after less than 10,000 had been produced. It suffered from a perception that it was merely an enlarged ADO17 "Landcrab" (indeed, it gained the nickname "Land-lobster"), with which it shared its central section and doors, although it was in fact a quite different car.

No replacement car was made by Austin in this class since by the time one would have been required, Rover and Triumph were also within British Leyland, and this was seen as a market segment more properly served by those marques.

Austin 3-Litre car rear view