The Volkswagen Group A platform is an automobile platform shared among compact and mid-size cars of the Volkswagen Group.It 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.Volkswagens based on this platform have been referred to by generation number, i.e. the first Golf version would be referred to as an "A1 Golf".