Armstrong Siddeley Thirty History
Catalog record
This is a brief catalog introduction with limited source documentation. A licensed, identity-checked lead photograph has not yet been added for this page. Detailed year, configuration and ownership coverage must be identified separately; this page is not a complete vehicle catalog.
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Model history available. Detailed year guides are not published for this model.
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The Thirty was the first car launched under the new Armstrong Siddeley name in 1919, following Armstrong Whitworth's acquisition of the Coventry firm Siddeley-Deasy. A large, dignified machine powered by a 5-litre 30 hp six-cylinder engine, it was aimed at the aristocracy and the upper end of the carriage trade — a positioning the company would maintain for the next four decades. Around 2,770 examples were produced across the model's twelve-year life.
The Thirty established the visual and marketing signatures the marque kept through its entire existence: the Sphinx bonnet mascot and the slogan 'As silent as the Sphinx', emphasising hushed refinement over outright performance. Coachbuilders fitted a range of open touring, saloon, and limousine bodies to customer order. The model was superseded when the Siddeley Special arrived for 1933 as a far more technically advanced replacement.
Body styles
- Tourer
- Saloon
- Limousine
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