Hi Wasserspeier, i have absolutely no idea for those Porsches and about the Mustangs, well to start of with i think it is a Chevrolet Camaro, it is not a Ford Mustang for sure, i think it is a scene from Bad Boys 1 in where a muscle car chases a Chevy Step van, i dont see the car in imcdb so perhaps we are missing it.

http://www.imcdb.org/vehicle_115473-Chevrolet-Step-Van-P-20.html