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1949–1955 · MG T-Series Decoder & Registry
MG TD and TF Chassis Number Decoder
TD and TF sit on either side of a major change in MG identification. PetrolJunky handles the simple TD/TD-C sequence and the much richer TF code without requiring the owner to know which numbering system they have.
Decoder coverage: 1949–1955
TD / TD-C TD production-year ranges TF encoded color and market TF1250/TF1500 transition handling
Decoder reference
What this decoder page is designed to answer.
TD uses the model code plus a sequential car number
TD and TD/C identify the standard and Competition/Mark II families. The surviving production chronology is detailed enough to place the serial number into a production year block.
TF introduced a richer BMC code
A TF identifier such as HDA13/0501 encodes the two-seat MG body, original color, market, paint finish and car number. That scheme continued into early MGA production, so PetrolJunky uses the serial boundary at 10101 to distinguish the two models.
The TF1500 transition is intentionally conservative
The earliest TF1500 period contains a documented block where XPAG and XPEG engines alternated. PetrolJunky labels that block as a 1250/1500 transition instead of falsely identifying every chassis as one engine version.
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Common questions
TD / TF VIN decoder questions
What does TD/C mean?
TD/C identifies the TD Competition or Mark II specification family.
Can the TF chassis number identify original color and market?
Yes. The TF BMC-style code contains separate color, market and paint-finish positions before the car number.
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