Triumph TR250 & TR6 Vehicle Identification

When ordering parts, it is essential that your car is identified exactly, by model year and serial number. Since many part changes were made during model years, the commission number, engine number and body number provide the only positive identification. Quite often, a car’s registration will not show the correct model year. Before ordering parts, please use the space to the right to copy the applicable numbers from your car. Use of these numbers is the best way to ensure that you order and receive the correct parts.

The commission number is the one which should live with your car forever. Engines, gearboxes etc., can be exchanged and thus new serial numbers will appear on those major units. The commission numbers live with the body shell and chassis assemblies. It appears Triumph used the “body number” as a separate identifier, but they seem to have always used the commission number with the numbers reversed and letters used as a suffix rather than a prefix: Thus a car with the commission number CC53876 would have a body number of 53876CC.

For ease of use we use model years as applications wherever possible. Check your commission number against the chart below to determine your car’s “theoretical” model year. In some cases specific commission numbers are quoted in the text where a specification change occured in the middle of a model year range. In general the axle and engine numbers follow the chassis number. The TR gearboxes were essentially the same as the Triumph 2000/2500 series of saloon cars and thus there is considerable intermingling of gearbox numbers including a ‘CD’ series.

It is always useful to know the serial number of the units in your car, as it may give our sales staff a clue as to whether your car has been altered from the original specification. When ordering gearboxes (especially) or engine components it is im­por­tant to provide us with the serial number of the unit concerned.