I did actually crop it and then removed it. something about having full view of the smoke stacks in the back made the photo feel like its more of a mix of the background and the foreground. What I did crop a bunch was the road. On both pictures really, I was only about 4 feet from the cars, and the 14-24mm is extremely wide. I also put it into dxo viewpoint to straighten the lines up just a tad bit.
I can see how the smokestacks would be cool and can add to a photo of an R8 - good contrast of industrial/old with modern/new. However, it might've worked against you in this case. If they were put to the side or further in the distance with more contrast between car and stacks, it might've been better. The stacks in your photo are protruding out of the R8 - a bit distracting.... it's fighting for attention with the R8.
Good call the audi was at 24mm. The lambo was at 14mm . I was about 10 inches away from the bumper on that shot if I recall. I was going to put it in dxo viewpoint to straighten the outside lines up but couldnt figure out how to just shrink the guy while keeping the car with the fish eye effect.