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MORRIS TWELVE-FOUR Series II/III

By 1935 the Cowley based Twelve horsepower car was looking decidedly outdated. Following "Specialisation" in 1934 which produced the Eight in that year the opportunity was taken to produce amore modern looking car as the first of the Series cars. Launched in mid 1935 the Series II (there never was a Series I apart from the Eight) range of cars started with rakish looking saloons available in 10 and 12 hp form. The engines continued more or less unchanged from the earlier models (now called thepre-Series cars) but the overall product was a much better car which handled and performance well up to its rivals.

In1937 the engine was revised to give it overhead valves and a subsequent increase in performance and sold as the Series III. The picture abpove shows that Series III launch at one dealer's showroom.

 

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Twelve four Series II/III

Engine

 
Series II
Series III

Number of cylinders

4
Bore mm
69.5
Stroke mm
102
Capacity cc
1548
Valves
side
overhead
RAC hp rating
11.98
CR
BHP (graphs)
at rpm
   
Valve timing
inlet opens
ATDC
ATDC
inlet closes
ABDC
ABDC
exhaust opens
BBDC
BBDC
exhaust closes
ATDC
ATDC
Coolant
water
water
Carburation
SU
SU

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Dimensions
Wheelbase
8'4"
Track
4'2"
Length
13'4"
Width
5'0"
Weight
21
Front suspension
half elliptic
Rear suspension
half elliptic
Axle ratio
5.375
5.25
Tyre size
Magna wheels
4.75 x 18

Easiclean

550 x 16

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Performance
0 to 50 mph secs
28
20.2
standing quarter secs
 
Fuel consumption mpg
28
30
Maximum speed
64
71

 

Body styles
gggggggggggggggggggg
 Doors
1936
1937
Saloon sliding head
4
X
X
Saloon fixed head
4
X
X
Special Coupe sliding head
2
X

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Chassis numbers
Series II
Series III
Start
S2/TW49342
S3/TW101 
Finish
S2/TW108659
S3/TW19565 
Total
59317
19464
Both The Tens and the Twelves shared the same sequence of chassis numbers

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Books and articles (available on the web)

 

Other sources
The Morris Owner
Issue
page
Ten-Four & Twelve-Four Model introduction
6/35
351-4
All Models Eight to Twenty-Five
9/35
655-8
Twelve-Four model description
9/37
648-51
Description of new Series III models
9/37
676
Popularity of the Twelve-Four
12/37
956-8
Description of new Series III models
10/39
746
The Practical Motorist

Twelve-Four Saloon Road Test

14/3/36
734-5,737
Twelve-Four detailed description
28/8/37
698
Twelve-Four detailed description
4/12/37
170-2
Twelve Road Test
29/7/39
523-4
Motor Service
Twelve-Four Wiring diagram and Test data
11/51
148-150
The Motor Trader
Twelve-Four detailed description
25/8/37
197-9
Service Data Sheet 57
1/2/39
231-8
The Light Car and Cyclecar
Twelve-Four description
20/8/37
414-16

Twelve Road Test The Light Car

3/2/39
356-8
The Autocar
Olympia report The Autocar
16/10/36
768
Ten-Four & Twelve-Four Road Test
12/2/37
278-9
Twelve-Four detailed description
20/8/37
335-6

If anyone has copies of there articles please contact the webmaster so that they can be included on this site for reference.

1938 Morris 12/4 series III owned by Chris Bell

Visit his website on http://www.morris12.com

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Please send a picture of your car for inclusion

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