Austin 12/6

From Wikipedia, the free encyclopedia
Jump to: navigation, search
Austin Light Twelve-Six
Austin Six Saloon (1932) GS3184 5902656341.jpg
Light Twelve-Six
first registered 10 May 1932
Overview
Manufacturer Austin Motor Company Limited
Production 1931–1937
30,316 produced[1]
Body and chassis
Body style two seater Eton, tourer Open Road, saloons: steel—Harley, Ascot
fabric—Clifton
sports saloons: Kempton, Greyhound; sports tourer Newberry
Powertrain
Engine 1496 or 1711 cc Straight-6[2]
Transmission single-plate dry clutch, 3-speed centrally controlled gearbox taking the drive through an open propellor shaft to the spiral bevel driven three-quarter floating rear axle.[2]
Dimensions
Wheelbase 8' 10" 106 in (2,700 mm)[2]
Track 4' 2", 50 in (1,300 mm)[2]
Length 12' 2" 146 in (3,700 mm) (1931)[2]
Width 5' 2" 62 in (1,600 mm)[2]
Kerb weight Saloon 19½ cwt, 2,184 lb (991 kg)
Chronology
Predecessor variant of Austin Twelve
Successor Austin Fourteen Light-Six
Austin Light Twelve-Six engine
1496
Overview
Manufacturer Austin Motor Company Limited
Combustion chamber
Configuration Straight 6-cylinder[2]
Displacement 1,496 cc (91 cu in)[2]
Cylinder bore 61.25 mm (2.411 in)[2]
Piston stroke 84.63 mm (3.332 in)[2]
Cylinder block alloy cast iron, alloy crankcase. Four bearing crankshaft[2]
Cylinder head alloy detachable, pistons are special aluminium alloy[2]
Valvetrain side valves[2]
Combustion
Fuel system downdraught carburettor supplied by a petrol pump, ignition by battery and coil[2]
Fuel type petrol[2]
Oil system forced[2]
Cooling system radiator, fan, thermostatically controlled cooling water is circulated naturally
Output
Power output 24 bhp (18 kW; 24 PS) @2,400 rpm
Tax horsepower 13.96[2]
Chronology
Predecessor new
Successor none
Austin Light Twelve-Six engine
1711
Overview
Manufacturer Austin Motor Company Limited
Combustion chamber
Configuration Straight 6-cylinder
Displacement 1,711 cc (104 cu in)
Cylinder bore 65.5 mm (2.58 in)
Piston stroke 84.63 mm (3.332 in)
Cylinder block alloy cast iron, alloy crankcase.
Cylinder head alloy detachable, pistons are aluminium
Valvetrain side valves
Combustion
Fuel system downdraught carburettor supplied by a petrol pump, ignition by dynamo combined as a unit with the fan above the cylinder head
Fuel type petrol
Cooling system radiator, fan, thermostatically controlled cooling water is circulated naturally
Output
Power output 38.7 bhp (28.9 kW; 39.2 PS) @3,800 rpm
Tax horsepower 15.96
Chronology
Predecessor new
Successor Austin Fourteen

The Austin Light Twelve-Six was introduced by the Austin Motor Company in January 1931[2] continuing in production until 1937. It was named by Austin Light Twelve to separate it from the well-established Austin Twelve. The general public then dubbed the original Twelve Heavy Twelve but Austin never used that name.

There was among British car makers in the early 1930s a vogue for small capacity six-cylinder engines and the 12/6 was Austin's example. The side-valve engine was new and initially of 1496 cc capacity. It was supplemented by an increased 65.5 mm bore, larger capacity 1711 cc option from 1934. Initially there was a three-speed transmission but a four-speed was an option from 1932 and became standard in 1933. This gained synchromesh on third and top speed in 1934 and on second in 1935.

The chassis was very conventional with semi-elliptic leaf springs on all wheels and rigid axles front and rear. There was a range of bodies on offer with initially a fabric bodied saloon and a pressed steel six-light (three windows on each side) saloon called the Harley. For 1932 the short lived fabric saloon (now well out of fashion) was dropped but open two and four-seat tourers were added. A further saloon with a boot, the Ascot, was added in 1934 and the Harley was dropped in 1935. At first the Ascot had the chromium plated radiator shell and front wings like the Harley but these were quickly succeeded by a radiator cowl painted in body colour and slightly different wings.

A Sports variant was added in 1933 with a lowered chassis and higher compression engine named Greyhound. There was also another body named Kempton on the same chassis. There were open two-seater Eton and four-seater Open Road tourer options of the Harley and later of the Ascot models.

The chassis was shared from 1933 with the four-cylinder Austin Light Twelve-Four as well as the original Austin Twelve.

1936
Ascot

saloon

Kempton

sports saloon

Open Road

tourer

Eton

two-seater

length
158 in (4,000 mm)
156 in (4,000 mm)
158 in (4,000 mm)
158 in (4,000 mm)
width
61.5 in (1,560 mm)
62 in (1,600 mm)
61.5 in (1,560 mm)
61.5 in (1,560 mm)
height
66 in (1,700 mm)
62 in (1,600 mm)
67.5 in (1,710 mm)
67.5 in (1,710 mm)


Austin Light Twelve-Six Ascot 1935
Austin Light Twelve-Six 1935
Kempton Sports Saloon, 1711cc
also available with 1496 cc engine, both engines with a high compression cylinder head and high lift camshaft producing
41 bhp @ 3,800 or 37 bhp @ 3,800


References[edit]

  1. ^ Sedgwick, Michael (1989). A-Z of Cars of the 1930s. Devon, UK: Bay View Books. ISBN 1-870979-38-9. 
  2. ^ a b c d e f g h i j k l m n o p q r Austin, The Times, Saturday, Jan 24, 1931; pg. 3; Issue 45729.