Whereas the postwar austerity 6/80 had shared all but its radiator shell and interior finish with the Morris Six, the 6/90 design used the Italian-style body panels of the previous year's Riley Pathfinder, although (because big Wolseleys were all six-cylinder cars) not Riley's traditional sporting "big four" engine or its suspension. These Morris, Riley and Wolseley cars had all been designed by the Nuffield Organization before it merged with Austin to become BMC. All three marques would soon be heavily involved in BMC's badge engineering.