1922 Sunbeam “3½ h.p. T.T. Sporting Model“ 492cc side valve frame # 06183 engine # 185/17367
1922 Sunbeam “3½ h.p. T.T. Sporting Model“ 492cc side valve frame # 06183 engine # 185/17367
After the Great War, Sunbeams first new design was a side valve of 77mm bore and 105.5mm stroke, known at the works as the ‘Longstroke’ to differentiate it from its short-stroke predecessor. The new engine made a fantastic impression at the 1921 French Gran..