|
Year |
Month |
Chassis |
Features Introduced |
|
Austin Twelve
(11.9HP) |
|
1932 |
Inception of Light
Twelve Four (11.9
HP) |
|
1933 |
July |
6 200 |
Cross braced frame
introduced |
|
1933 |
Aug |
6 559 |
Synchromesh for 3rd
and 4th speeds |
|
1934 |
Aug |
14 193 |
Synchromesh for 2nd
speed. Sloping
cellulosed radiator
cowl, automatic
direction indicators
and foot dip switch |
| |
Sep |
14 401 |
Thermostat fitted |
| |
Oct |
15 065 |
Carbon thrust
bearing introduced
for clutch |
| |
|
15 315 |
Bowden cable
operation adopted
for front brakes |
|
1935 |
Feb |
18 422 |
Radiator filled cap
placed same side as
oil filler |
| |
June |
21 607 |
Worm and sector
"hourglass" steering
adopted |
| |
July |
22 700 |
Downdraught type
carburetor adopted |
|
|
Nov |
26 527 |
Positive Pole
Earthing |
|
1936 |
April |
31 089 |
Rubber mounted
change speed lever |
| |
June |
33 759/848 |
Cast brake drums and
steel brake shoes |
|
|
|
33 898 |
Clutch cover with
oil pipe fitted |
|
1938 |
July |
|
Engine: higher
compression ratio;
aluminum cylinder
head; larger inlet
valves.
Connecting rods
drilled for cylinder
lubrication |
|
|
July |
|
Spring centre clutch
disc |
| |
July |
|
Positive lubrication
and interleaving for
spring leaves.
Piston type shock
absorbers. |
|
1939 |
Aug |
|
Engine: larger
crankshaft;
barrel-shaped
tappets; cone-shaped
oil filter; vacuum
control of ignition
timing |
| |
Aug |
|
Torsion bar
anti-roll
stabilizers |
| |
Aug |
|
Provision for
built-in heating and
air conditioning |
|
1946 |
|
|
Gearbox extension
housing to provide
additional bearings
for propeller shaft |
|
1948 |
|
|
Production ceased |
|
Austin Heavy Twelve
(12.8HP) |
|
1927 |
Aug |
27 179 |
Raised radiator and
cowl and longer
bonnet. Track
increased from 4ft
4in to 4ft 8in. |
|
1928 |
July |
49 801 |
Larger fuel tank and
Hobson Telegauge
fitted |
|
1929 |
March |
56 519 |
Ball type gear
change |
|
1930 |
Feb |
62 061 |
Air cleaner fitted |
| |
Dec |
67 752 |
Zenith 'U' type
carburetor fitted |
|
1931 |
April |
68 592 |
"All black" finish
instead of plated
instrument rims |
|
1932 |
May |
71 001 |
Hardy Spicer type
propeller shaft
introduced |
|
|
Sep |
71 751 |
Luvax hydraulic type
shock absorbers
introduced |
|
1933 |
Feb |
72 351 |
Twintop gearbox,
coupled hand- and
foot brake controls
and flood lit
instruments |
| |
Sep |
74 372 |
Cross-braced frame,
synchromesh gearbox,
rubber engine
mountings, modified
brakes, steering and
new front and rear
axles |
|
1934 |
Aug |
77 012 |
Synchromesh
incorporated for 2nd
gear |
|
|
Nov |
77 814 |
Sloping cellulosed
radiator cowl.
Coil ignition and
automatic advance.
Zenith 'V' type
carburettors with
air cleaners.
Automatic direction
indicators and flood
switch |
|
1935 |
April |
78 827 |
Radiator filler cap
same side as oil
filler |
| |
June |
79 243 |
Marles-Weller cam
and lever steering
introduced |