Volkswagen Group A platform
The Volkswagen Group A platform is an automobile platform shared among compact and mid-size cars of the Volkswagen Group. The first version debuted in 1974 and was originally based on the engineering concept of the Volkswagen Golf Mk1, and is applicable to either front- or four-wheel drive vehicles, using only front-mounted transverse engines.
Source: Wikipedia — Volkswagen Group A platform (CC BY-SA 4.0)