Royston Charles Lunn was an engineer in the automotive industry. He had forty-one years in the design development and production of vehicles and most notably served as the head of engineering at American Motors Corporation (AMC) from 1971 to 1987. Lunn is credited as being the "father of the modern SUV" and "the godfather of the Ford GT40".

The AMC straight-4 engine is a 2.5 L inline-four engine developed by American Motors Corporation (AMC) that was used in a variety of AMC, Jeep, and Dodge vehicles from 1984 to 2002.