Sometimes it doesn’t even seem like they were trying to show how big the trunk was, just showing that, hey, a couple of women could sit in here, if they want. Like that Tatra 603 photo up there. Those women aren’t crammed in there, there’s room for more people, so what exactly are they demonstrating? I mean, it’s kinda fun to cram into a trunk and see what it’s like in that space. I’ve done it myself! But I don’t ever think this was actually useful. Also interesting on that 1960s Lancia brochure: the other woman shown in the brochure, on the cover, doesn’t even seem to actually have been photographed at the location; look at the edges of her hair:
I think she was X-acto’d out of another picture and pasted in. At least the trunk women got to hang out with that lovely Lancia, at least. Excellent and weird bumper guards on this thing, too. “If it can hold 5 intact women, think about how many it can hold after you’ve chopped them up!” You obviously aren’t old enough to remember high school drive-in movies. Standard operating practice was one couple up front to pay for the film, and various parties in the trunk while passing through the gate. Upon hitting the parking spot, they would decamp and position themselves in the rear seats. Monkey business did occur whilst in the trunk, obviously. So sometimes it was actually the preferred location. Depending on how hot-to-trot that couple mignt have been at the time.