Going by the BMC Workshop Manuals:
The first six cylinders carried on using the 1C ( first series C-type engine)
number system, with an "H" denoting High Compression.
The numbering system was changed from late 1957 on, and was now three groups
separated by slashes:
In the "First Prefix Group":
- the number is the displacement, ie. 26 = 2.6 liter, or 8 = 850cc
- the first letter is the BMC make, ie. M is for Morris, G for MG, R for
Riley, V for Princess, W for Wolseley, J for Commercial and......wait for it
Gergo.......H is for "Miscellaneous Special".
'A' for Austin as a first letter is not found on Austin motors. ( for eg. the
first 3 liter A-99 had only a '29' motor, but the similar Wolseley had a
'29W' motor.
- the second letter after the displacement (or the first one after, for
Austins) is for "variations of engine type". Here, an 'A' was used as a
First Variation. For eg. the second model of 3 liter Austin, the A-110, had a
'29A' motor, and the corresponding Princess Mk II had a '29VA' motor. The
Austin motors in the Healey 3000 had 29D,E,F and K variations.
The "Second Prefix Group" has to do with the gearbox, R being Laycock
overdrive (O is Borg Warner), and U being side or centershift (as opposed to
column shift).
The third group is the serial number, preceded by a high (H) or low (L)
compression indicator.
........so is there anything interesting about your 26H motor ?
Peter
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