Let's see....
Rear side vents / Fender flares : Obviously Audi Quattro
Rear end shape and front fender curve: Rothmans Porsche 959 GrB
Upswept front wing blending into fender flare: MG Metro 6R4
Rear Wing: Peugeot 405T16 Pikes Peak
The rest looks like Subaru 555 WRC except for the hood heat vent, the shape of that reminds me of a Lancer or Citroen BX4TC.
How did I do??

Rear side vents / Fender flares : Obviously Audi Quattro
Rear end shape and front fender curve: Rothmans Porsche 959 GrB
Upswept front wing blending into fender flare: MG Metro 6R4
Rear Wing: Peugeot 405T16 Pikes Peak
The rest looks like Subaru 555 WRC except for the hood heat vent, the shape of that reminds me of a Lancer or Citroen BX4TC.
How did I do??