Flat Head Six Engine Numbers That Start With "P"
 
 
Dodge used the letter P as the first letter in Plymouth Car engines, so an engine that has the first letter as a P is most likely out of some model of Plymouth Car.
 
The list below is all the Engineering codes for each model of Plymouth Car that could be found at the time this list was made. The Engineering code is normally the code that is used as the beginning of the engine number on these vehicles. Most of these codes will be followed by a sequential number that would help calculate when the engine was made if a list of starting numbers was available. These codes are in order by first letter, and then numeric order, not by year, or type of vehicle.

Engineering code Displacement Length of head Make Model Year
P1     Plymouth Car Plymouth 6 1936
P2     Plymouth Car Plymouth 6 De Luxe 1936
P3     Plymouth Car Plymouth 6 1937
P4     Plymouth Car Plymouth 6 De Luxe 1937
PT50 201ci 23 inches Plymouth Car Plymouth 6 Commercial (Plymouth Pickup Truck) 1937
P5     Plymouth Car Plymouth 6 1938
P6     Plymouth Car Plymouth 6 De Luxe 1938
PT57 201ci 23 inches Plymouth Car Plymouth 6 Commercial (Plymouth Pickup Truck) 1938
P7     Plymouth Car Plymouth 6 1939
P8     Plymouth Car Plymouth 6 De Luxe 1939
PT81 201ci 23 inches Plymouth Car Plymouth 6 Commercial (Plymouth Pickup Truck) 1939
P9 201ci 23 inches Plymouth Car Plymouth 6 Road King 1940
P10 201ci 23 inches Plymouth Car Plymouth 6 De Luxe 1940
PT105 201ci 23 inches Plymouth Car Plymouth 6 Commercial (Plymouth Pickup Truck) 1940
P11 201ci 23 inches Plymouth Car Plymouth 6 Standard 1941
P12 201ci 23 inches Plymouth Car Plymouth 6 De Luxe 1941
PT125 201ci 23 inches Plymouth Car Plymouth 6 Commercial (Plymouth Pickup Truck) 1941
P14S     Plymouth Car Plymouth 6 De Luxe 1942
P14C     Plymouth Car Plymouth 6 Special De Luxe 1942
P15S     Plymouth Car Plymouth 6 De Luxe 1946-1948
P15C     Plymouth Car Plymouth 6 Special De Luxe 1946-1948
P18 218ci   Plymouth Car Plymouth 6 De Luxe and Special De Luxe 1949
P19     Plymouth Car Plymouth 6 De Luxe 1950
P20 218ci   Plymouth Car Plymouth 6 De Luxe and Special De Luxe 1950
P22 218ci   Plymouth Car Plymouth 6 1951
P23 218ci   Plymouth Car Plymouth 6 1952
P24 218ci   Plymouth Car Plymouth 6 1953
P25 218ci   Plymouth Car Plymouth 6 1954
P26 230ci 23 inches Plymouth Car Plymouth 6 1955
P28 230ci 23 inches Plymouth Car Plymouth 6 1956
P30 230ci 23 inches Plymouth Car Plymouth 6 1957

Please contact the Registry maintainers at the below email address if you have any suggestions or questions.

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