I only looked at your first picture, a Jaguar. I know it's a Jaguar because I saw the logo...which is an IP refusal.
So looking at your picture from a quality point of view I see overdone processing, probably due to aggressive noise reduction.
That's a technical issue. It's unrecoverable.
The second picture has no logo in, but you did also overprocess and I think you boosted contrast a lot too.
You have nice shots, but you need to do natural looking processing. And the picture needs to have low noise and a good equilibrated histogram to start with. And don't forget: no logos or other things like license numbers etc.
Thanks for these helpful comments. I am learning alot. Chris.