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Ten/Twelve Series III 1938 - 9
Bhp graphs

Dimensions

 

The Series models went away from the chrome grille to a painted style in 1938. Thre was a change to the engine as both models had an overhead valve engine although the bore and stroke remained the same.

The picture shows a showroom at the launch of the series III Twelve.

 

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Ten-Four and Twelve Series III

Engine

 
Ten four
Twelve Series

Number of cylinders

4
4
Bore mm
63.5
69.5
Stroke mm
102
102
Capacity cc
1292
1548
Valves
overhead
overhead
RAC hp rating
10.0
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
 
Ten-four
Twelve
Wheelbase
8'4"
8'0"
Track
4'2"
Length
13'4"
Width
5'0"
Weight
21 cwt
Front suspension
half elliptic
half elliptic
Rear suspension
half elliptic
half elliptic
Axle ratio
5.375
5.25
Tyre size
550 x 16
550 x 16

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Performance
0 to 50 mph secs
25
20.2
standing quarter secs
25.6
Fuel consumption mpg
30
30
Maximum speed
65
71 

 

Body styles
 
Doors
Ten-four
Twelve
Saloon sliding head
4
X
X
Saloon fixed head
4
X
X
Special Coupe
2
X
 

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Chassis numbers
Ten-four
Twelve
Start
S3/TN108711
S3/TW101 
Finish
S3/TN122430
S3/TW19565 
Total
13,719
19,464

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Books and articles (available on the web)

 

Other sources
The Morris Owner
Issue
page
All Models Description of new Series III models
9/37
676
Twelve-Four model description
9/37
648-51
Popularity of the Twelve-Four
12/37
956-8
All Models Description of new Series III models
10/39
746
The Light Car and Cyclecar
Ten Saloon Road Test The Light Car
17/9/37
Twelve Twelve-Four description The Light Car
20/8/37
414-16
Twelve Road Test
3/2/39
356-8
The Autocar
Twelve-Four detailed description
20/8/37
335-6
The Motor Trader
Twelve Service Data Sheet 57
1/2/39
231-8
Twelve-Four detailed description
25/8/37
197-9
Practical Motorist
Ten-Four Road Test
11/6/38
236-7
Twelve Road Test
29/7/39
523-4
Twelve-Four detailed description
4/12/37
170-2
Twelve-Four detailed description
28/8/37
698

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

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Please send a picture of your car for inclusion

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