Singer SM1500 Saloon made its appearance in October 1948, and during 1949 the earlier Super Ten and Twelve Saloons were phased out. The SM1500 was placed into quantity production in mid-1949, alongside the Nine Roadster. It is an entirely new modernized model with coil-spring IFS, full-width body on longer wheelbase (separate) chassis. Power unit is modernised ohc twelve engine, now of 1506cc giving 48bhp and 72 mph. Four speed gearbox have column change. The body styling is not as elegant as most of its contenders in the 1½-litre class. The price is £799.
Roadster 4A from late 1949, gets four speed box from the new SM 1500 saloon a Solex carburettor and other detail modifications.