I'm assuming you have only one spotlight in the scene?
Try adding two more but with much lower intensity to support your main spotlight, that should also let you tone down enviroment lighting which can make scene look little "flat". Try adding one in fairly low angle to light up the front of the car and second to somewhere above, maybe little bit to right-rear from car's center.
Also, don't be afraid to experiment with all kinds of colors for the floor, anything is better than gray
Porsches have intercooler on top of the engine, just under the lid. As for turbocharged middle-engine layouts, only one that comes to mind is Saleen S7 TT which has intercoolers on both sides of the engine.
Hmm... scratch that, looks like the source was wrong and it doesn't have IC.
But if it had, it would be a whole lot easier to mount two small ones than run piping all around the engine.
But my point being, you'd have to do some pretty crazy piping to mount IC to the front for a rear/mid engined car.
I'm in a couple of MR2 clubs, and a lot of the people run Water to Air intercoolers in the Mk1's (better than heat soaking the standard cooler in the bay, no lag due to short piping, not having to worry about mounting the A2A cooler close so its doesn't lag/cutting bits out of the body etc) altho some have rear roof mounted air to air...
I've also seen them cut into the floor of the boot, and the top of the bootlid on MK2's
Standard I/C on Mk1 is over the engine, Mk2 i believe is one side, behind one of the rear vents.
Yeah, a lot of cars with the engine in the FRONT. In a car with the engine Mid mounted, or Rear mounted, having the intercooler piped all the way to the front causes massive lag issues, as the turbo/supercharger has to compress the air in the pipework to the front, cooler, and back again.
Water to air Tank on a MK2 MR2 (a water pump moves the water thru to a cooler, and back again, so the air being compressed is small(compared to A2A plumbed all over the place), reducing boost lag