With little English and a German surname and accent the subsequent outbreak of the First World War meant twelve months under a cloud of suspicion until the authorities gave him the benefit of the doubt.
[4] However in 1919 Talbot was acquired by Darracq and Company London, and the following year the resulting combination brought in Sunbeam to form S T D Motors.
Between 1920 and 1925 Roesch worked with STD under Louis Coatalen to develop a six-cylinder push-rod engine of striking simplicity and efficiency.
The first Rootes Sunbeam, named the Thirty, designed by Georges Roesch, was propelled with a new 100 mph 4503 cc straight-eight engine.
There may have been as many as eight prototypes made and some were displayed at the 1936 Motor Show but the new model did not go into production and Roesch left Sunbeam-Talbot going to David Brown in 1939 to develop a tractor design.