Thankssss ska!

I probably have the missing one, I had started something with it. I'll try to find it and PM you. 

Tourist's edit looks much lighter than the original, probably because of a similar strange issue I have with this piece: when I download it, it does look lighter than in the browser.
NDChristie's edit is not affected in this way, and I've never seen this behavior in pixels before.
No idea about either cause or fix.

It kinda looks like a pair of dots though, rather than a reflection.

Because they contradict the gradient: highlights say light source is from up left and back, gradient says low front right.

I think you can go further into the rounder looks, compared with those refs you posted on PJ. I'm sure this must be incredibly difficult to get right in iso.

The right fender (cars') disappears completely in the 'almost-iso' photograph. The bumper is more curved. The back is much more plunging (in the side view), which is a distinctive feature of Saabs.
The windshield corners are more rounded too.

Input on how to improve curvature using shading is still welcomed.

To be honest I didn't have very specific ideas about that!
Looking harder, I can see at least one point: those lines (shades and reflections) you have on the side are very straight. On the 'iso' photo they help a lot to define the softer volumes. Same thing tor that dark shade on the left (cars') side of the roof, it's too close to the side and gives a feeling of a flatter roof than it is.

You have some inspiring undertakings. 


Your version looks more squarish than the actual car:
http://commons.wikimedia.org/wiki/Category:Saab_93
Maybe it's on purpose, since I see some of that in the Westminster too (no ref checked there though).
It's not the easiest thing to pixel anyway, and shading will help I'm sure.

It's mostly a problem with front and back fenders.

There is also a persp issue with the grille: it looks slightly to the right of the car's front middle.


I still don't know how to link text without the whole url appearing.