I came back with a guess, but now that I look at that DeDion rear axle, it's a Rover 2000.
I saw a DeDion axle under the back of a 1951 Dodge Route Van in a wrecking yard. Truck axles. They used it for the low floor height in inside.
edit: down the rabbit hole. According to
www.metaphorsinmotion.com...Automotive-Illustrations-from-the-50-s-and-60-s-Part-Two your illustration appeared in Sports Car Graphic December 1963.
And here's a De Dion on one of my favorite race cars:
https://www.f1technical.net/forum/vi...16395&start=64
At least I'm pretty sure; drum brakes and
kompressor over the transaxle.