From wild mid-engine experiments and Italian coachbuilt one-offs to aviation-themed charity cars and record-chasing EVs, the Ford Mustang has spent six decades living a double life: one you see in showrooms, and one that exists in design studios, wind tunnels, and race shops around the world. This article is a complete tour of that hidden history—a chronological guide to Mustang concepts, prototypes, and specials that never made it to mass production but helped shape the cars

The General Motors XP-511 Commuter Car, unveiled in 1969, was one of the most distinctive and unconventional prototypes from GM’s late-1960s experimentation with urban mobility. Also known as the ES-511, the concept was designed by Larry Shinoda—best known for his work on iconic performance cars like the Chevrolet Corvette Stingray. With the XP-511, Shinoda turned his attention to something entirely different: creating a compact, efficient city car that could deliver genuine

The General Motors XP-512G, unveiled in 1969, was part of an ambitious series of experimental commuter cars that showcased GM’s forward-thinking approach to efficient urban mobility. The “G” designation identified it as the gasoline-powered variant in the lineup, standing alongside other 512-series concepts that explored electric and hybrid technologies. As an open-top two-seater roadster, the XP-512G represented a blend of lightweight engineering, minimalist design, and prac