Brochure photos were taken well ahead of production launch, and used all manner of cars - shined-up prototypes and development cars, Pilot cars, auto show cars, and anything that was available at the time, and many of the photos were airbrushed/modified (or not) to represent what was thought at the time to be the production configuration, which frequently changed. I wouldn't put a lot of faith in early brochure photos as an indicator of what was actually built later.