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This is a listing of items that have been fitted to Thornycroft 250 engines throughout production. We hope this page will help you; if you do not see what you are looking for, please contact us. We may be able to help.

The inclusion of items on this page does not infer that these items are genuine Thornycroft spares. Please check carefully the suitability of the item for your own application.

Gasket sets listed do not contain gaskets for marinisation components.

Requests for Thornycroft spares should always be accompanied by the engine number / build list.

The Thornycroft 250 is a 4 cylinder, 4 stroke, vertical, inline 4.165L diesel engine, based on the Ford 2712 Dorset industrial engine.

Popular with commercial and private operators, the Thornycroft 250 proved to be one of the best selling 4 cylinder power units available, offering good horsepower and excellent reliability. Both Heat Exchanger and Keel Cooled versions were produced.

Thornycroft always used a separate manifold and heat exchanger on their engines. These can be replaced by the latest combined heat exchanger manifold unit. Eventually the 250 was replaced by the Thornycroft 251, an uprated and modified version of the same engine.

From the MS-05-250 Thornycroft leaflet, ratings are as follows:

1250RPM 42BHP 9.55LPH, 1500RPM 50BHP 11.18LPH, 1750RPM 57BHP 12.73LPH, 2000RPM 64BHP 14.59LPH, 2250RPM 69BHP 16.14LPH, 2500RPM 72BHP 17.41LPH.

Intermittent rating is shown as 80BHP.

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