Complex sentence: The A40 Devon (and similar 2-door A40 Dorset) were automobiles marketed by the Austin Motor Company from 1947 to 1952 & madash; the first post-war saloons to be produced by Austin--feauring a mix of old and new technologies.
Split into simpler sentences: The A40 Devon (and similar 2-door A40 Dorset) were automobiles sold by the Austin Motor Company from 1947 through to 1952. They were the first post-war saloons to be produced by Austin, and thus featured a mixture of old and new technologies.