There was little development in automobile design during the 1940s. The Great Depression made it difficult for many Americans to afford an automobile, and WWII halted the production of a number of goods during the late 1930s and early 1940s. Therefore, the design of the 1930s lives on with little significant change. Curves became slightly less exaggerated, especially around the front end of the vehicle, and some of the chrome detail that characterizes the 1950 automobile years began to make an appearance.
The following images represent standard 1940s automobiles. Note the slightly less exaggerated curves around the fender and front end.
Note the chrome details around the grille and along the body of the automobile below.