Boom! A forum dedicated to automotive blueprints. I found it through this fun little diagram of an old Renault Clio sedan.
It’s called SMCars.net Car Blueprints Forum which is oddly but delightfully specific.
There’s some really fascinating stuff here.
You sort the blueprints by manufacturer. Which is how I found things like this blueprint of a 1989 Alfa Romeo 33 Series 3 station wagon.
Or this 2011 Citroen C4. I think it widely varies but some of these are made by the contributors. I’m not sure this one was but that top shot of the Clio obviously was.
Update: This Bedford one is very fine.
And they even have a first gen Chevy Cruze! Mine isn’t nearly as fancy as the one shown but it gets the point across. Also, the side view is an RS trim and the rear is an LTZ trim.
Drop any car blueprints you really like in the comments below.