The engines of the 'DS' and the 'ID':

prototype of the water cooled 6 cylinder boxer engine
prototype of the water cooled 6 cilinder boxer engine
The engines of the 'DS' and the 'ID' were never the most revolutionary part of the car. The original plans for a air cooled, and the alternative water cooled 6 cylinder boxer engine never made it to the production stage.

Due to problems with the cooling of the last two cylinders, and the fact that the budget for the development of a new engine was insufficient, the decision was made in 1954 to bring out the 'DS' with a modernized version of the 1.911 cc engine (11D) of the 'Traction Avant'.

By placing of this engine behind the front axle in stead of in front a hole had to be made in the separation plate. The three seat bench was therefore never realized. On the other hand, it made room for the spare tire in the front under the bonnet.


The evolution of the 'DS' engines:
This long stroke four cylinder engine with a threefold crankshaft bearing, originates from 1934 where it had a stroke of 1.303 cc. The old cylinder head was replaced by Walter Becchia with a aluminium version with semi-sfere shaped ignition chambers. The power output increased from 60 bhp to 75 bhp. This engine was the first one in the DS, and also has the engine code DS

In March 1961 the new version of the this engine was introduced (DA) and the power increased to 83 bhp. The long stroke engines are very robust and almost indestructible.

To meet the demand for more power and torque, Citroën introduced in September 1965 two (and after a year three) new short stroke engines, with a stroke of 1.985 cc (DY and DV) and 2.175 cc (DX) in the DS21.
The engines have a fivefold bearing of the crankshaft. Through several adjustments during the years, the power increases to 108 bhp (DY3) and 115 bhp (DX2).
Engine type DS from 1955 - March 1961
Engine type 'DS' from 1955 until March 1961
In September 1969 the 'DX' engine was fitted with a Bosch electronic fuel injection system (DX3). The power rises to 124 bhp in the DS21 I.E.. It was for the first time that such a system was fitted on a normal limousine car.

In August 1972, the 'DX'-engine is finally enlarged to 2.347 cc. In combination with a carburetor (DX4) the engine produced 124 bhp in the DS23, and with fuel injection (DX5) 141 bhp and a top speed of 188 km/h in the DS23 I.E..
Engines of the DS:
DS19
Engine code DS
Period October 1955 - March 1961
Capacity 1.911 cc
Power 75 SAE pk at 4500 rpm
Cylinders 4
Bore 78 mm
Stroke 100 mm
Compression ratio 7,5 : 1
Main bearings 3
Fuel system Two stage Weber 24/30 DDC or Zenith EEAC carburetor
 
DS19
Engine code DA
Period March 1961 - September 1965
Capacity 1.911 cc
Power 83 SAE bhp at 4500 rpm
Cylinders 4
Bore 78 mm
Stroke 100 mm
Compression ratio 8,5 : 1
Main bearings 3
Fuel system Two stage Weber 24/32 DDC carburetor
 
DS19A
Engine code DY
Period September 1965 - September 1968
Capacity 1.985 cc
Power 90 SAE bhp at 5250 rpm
Cylinders 4
Bore 86 mm
Stroke 85,5 mm
Compression ratio 8,75 : 1
Main bearings 5
Fuel system Two stage Weber 28/36 DDE or 28/36 DDEA2 carburetor
 
DS20
Engine code DY2
Period September 1968 - September 1971
Capacity 1.985 cc
Power 103 SAE bhp at 5900 rpm
Cylinders 4
Bore 86 mm
Stroke 85,5 mm
Compression ratio 8,5 : 1
Main bearings 5
Fuel system Two stage Weber 28/36 DLE2 or 28/36 DLEA2 carburetor
 
DS20
Engine code DY3
Period September 1971 - april 1975
Capacity 1.985 cc
Power 108 SAE bhp at 5500 rpm
Cylinders 4
Bore 86 mm
Stroke 85,5 mm
Compression ratio 8,75 : 1
Main bearings 5
Fuel system Two stage Weber 28/36 DM1 or DLE2 carburetor
 
DS21
Engine code DX
Period September 1965 - September 1968
Capacity 2.175 cc
Power 109 SAE bhp at 5500 rpm
Cylinders 4
Bore 90 mm
Stroke 85,5 mm
Compression ratio 8,75 : 1
Main bearings 5
Fuel system Two stage Weber 28/36 DDE or DDEA1 carburetor
 
DS21
Engine code DX2
Period September 1968 - September 1972
Capacity 2.175 cc
Power 115 SAE bhp at 5500 rpm
Cylinders 4
Bore 90 mm
Stroke 85,5 mm
Compression ratio 8,75 : 1
Main bearings 5
Fuel system Two stage Weber 28/36 DLE or DLEA1 or DLEA5 carburetor
 
DS21 I.E.
Engine code DX3
Period September 1969 - augustus 1972
Capacity 2.175 cc
Power 124 SAE bhp at 5250 rpm
Cylinders 4
Bore 90 mm
Stroke 85,5 mm
Compression ratio 8,75 : 1
Main bearings 5
Fuel system Bosch elektronische inspuiting
 
DS23
Engine code DX4
Period augustus 1972 - april 1975
Capacity 2.347 cc
Power 124 SAE bhp at 5500 rpm
Cylinders 4
Bore 93,5 mm
Stroke 85,5 mm
Compression ratio 8,75 : 1
Main bearings 5
Fuel system Two stage Weber 28/36 DM2 or DLEA1 or DLEA5 carburetor
 
DS 23 I.E.
Engine code DX5
Period augustus 1972 - april 1975
Capacity 2.347 cc
Power 141 SAE bhp at 5500 rpm
Cylinders 4
Bore 93,5 mm
Stroke 85,5 mm
Compression ratio 8,75 : 1
Main bearings 5
Fuel system Bosch elektronische inspuiting


The evolution of the 'ID' engines:
The original engine of the ID from 1957 is almost identical to the first engine of the DS models. It's a 4-cylinder long stroke engine with a three bearing crankshaft and a capacity of 1.911 cc. In contradiction with the DS, the ID Normale has the unchanged 62 bhp 11D engine with a cast iron cylinder head from the Traction Avant.

This version was fitted from 1957 to October 1961 together with the ID 19P who had the light weight cylinder head like the engine from the DS. This DM engine delivered 66 bhp. Both engines were fitted with a single stage Solex carburetor.
In September 1964 the power of the DM engine is increased to 75 bhp.

In September 1995 the engine is changed again. This changed DE engine in the ID19A iwsa used until September 1966 and delivers 81 bhp.
Engine code '11D'
11D engine in a ID Normale
With the introduction in September 1965 of the new short stroke engine with 5 bearings with a capacity of 1.985 cc in the DS (DY and DV), this engine becomes in September 1966 also available for the ID in a changed version. In the ID 19B this new DV engine delivers 84 bhp.

This engine is further developed in the next years. In September 1968 the power increases to 91 bhp (DV2).

In September 1969 the model indication ID disappears , and the models are renamed DSpécial (successor of the ID19B), and DSuper (previous ID20). the DSpécial has the engine type DV2 with 91 bhp and from September 1971 with 98 bhp (DV3), and from September 1972 with the DY3 engine of 108 bhp.
The DSuper has until September 1971 the DY2 engine of 103 bhp and until April 1975 the DY3 engine with 108 bhp.

In September 1972 the ultimate ID is introduced. This DSuper 5 gets the larger DX2 engine of 2.175 cc with 115 bhp from the DS21, in combination with a 5-speed manual gearbox.
The engines of the 'ID':
ID 19 Normale
Engine code 11D
Period May 1957 - October 1960
Capacity 1.911 cc
Power 62 SAE bhp at 4000 rpm
Cylinders 4
Bore 78 mm
Stroke 100 mm
Compression ratio 6,8 : 1
Main bearings 3
Fuel system Single stage Solex 33 PBIC carburetor
 
ID 19P
Engine code DM
Period May 1957 - September 1964
Capacity 1.911 cc
Power 66 / 75 SAE bhp at 4500 rpm
Cylinders 4
Bore 78
Stroke 100
Compression ratio 7,5 : 1
Main bearings 3
Fuel system Single stage Solex 34 PBIC carburetor
 
ID 19 (Export)
Engine code DS
Period May 1962 - September 1965
Capacity 1.911 cc
Power 83 SAE bhp at 4500 rpm
Cylinders 4
Bore 78
Stroke 100
Compression ratio 8,5 : 1
Main bearings 3
Fuel system Two stage Weber 24/32 DDC carburetor
 
ID 19A
Engine code DE
Period September 1965 - September 1966
Capacity 1.911 cc
Power 81 SAE bhp at 4750 rpm
Cylinders 4
Bore 78 mm
Stroke 100 mm
Compression ratio 8,0 : 1
Main bearings 3
Fuel system Single stage Solex 32 SDID carburetor
 
ID 19B
Engine code DV
Period September 1966 - September 1968
Capacity 1.985 cc
Power 84 SAE bhp at 5250 rpm
Cylinders 4
Bore 86 mm
Stroke 85,5 mm
Compression ratio 8,0 : 1
Main bearings 5
Fuel system Single stage Solex 34 PBIC carburetor
 
ID 19B/DSpécial
Engine code DV2
Period September 1968 - September 1971
Capacity 1.985 cc
Power 91 SAE bhp at 5500 rpm
Cylinders 4
Bore 86 mm
Stroke 85,5 mm
Compression ratio 8,0 : 1
Main bearings 5
Fuel system Single stage Solex 34 PBIC carburetor
 
DSpécial
Engine code DV3
Period September 1971 - July 1972
Capacity 1.985 cc
Power 98 SAE bhp at 5500 rpm
Cylinders 4
Bore 86 mm
Stroke 85,5 mm
Compression ratio 8,0 : 1
Main bearings 5
Fuel system Single stage Solex 34 PBIC carburetor
 
ID 20/DSuper
Engine code DY2
Period September 1968 - September 1971
Capacity 1.985 cc
Power 103 SAE bhp at 5500 rpm
Cylinders 4
Bore 86 mm
Stroke 85,5 mm
Compression ratio 8,75 : 1
Main bearings 5
Fuel system Two stage Weber 28/36 DLEA2 or Solex 28/36 SFIF carburetor
 
DSpécial/DSuper
Engine code DY3
Period July 1972 - April 1975
Capacity 1.985 cc
Power 108 SAE bhp at 5500 rpm
Cylinders 4
Bore 86 mm
Stroke 85,5 mm
Compression ratio 8,75 : 1
Main bearings 5
Fuel system Two stage Weber 28/36 DMA3 or DLEA2 or Solex 28/36 SFIF carburetor
 
DSuper 5
Engine code DX2
Period July 1972 - January 1975
Capacity 2.175 cc
Power 115 SAE bhp at 5500 rpm
Cylinders 4
Bore 90 mm
Stroke 85,5 mm
Compression ratio 8,75 : 1
Main bearings 5
Fuel system Two stage Weber 28/36 DLEA1 or DMA2 or DMA4 carburetor

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