Un poquito no, estaba equivocado del todo.
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Gracias por la aclaración David, yo había sacado la información de aquí, pro la debí mal interpretar. es que yo y mi ingles
http://ccmv.fotopic.net/
Originally the Commercial Car Company, taken over by Humber in 1926 and renamed Commer Cars. Commer & Humber were taken over by the Rootes Group in 1928. Commer's distinctive 3-cylinder 2-stroke diesel engine designed by Rootes Group member Tilling Stevens - the "TS3" - was used extensively in the QX and later Maxiload models. Featured types: Q2, Q4, Q15, Q25, Superpoise 2-5 ton, QX underfloor-engine 7-12 ton, A25, Cob, BF 1 ton, Maxiload 14-16 ton & Walk-Thru.