Hi Alex:
i'm glad this post can help you ! You're talking about Alfasud Quadrifoglio(cloverleaf) Green or Golden,it was very popular and unexpensive in first 80's.
and YES...best part is boxer engine..style is not cool here,belongs to 80's ;)



This is my quick suggest
car is splitted in two parts:red(glossy) and black(matte plastic)
You can try with LOFT than draw on side wiew one long spline where match red part with black bottom part of the car
extrude this spline to trim your loft and delete his bottom part
now use sweep to make fenders and all black bottom part
no need continuity bewteen red and black..and when render you will have the red part that is one mesh,glossy with his reflections
bottom part will be different mesh but is also matte,not glossy,so you'll not have reflections
hope you understand and forgive me for basic english :)
M