Forget Janis Joplin's psychedelic 356- it's Tura Satana's Porsche in Faster, Pussycat! Kill! Kill! that we all remember now when we think of mid-60s Porsches...
Tura's sidekicks, Haji and Lori Williams, were forced to make do with less menacing British iron in the movie (and drive-in audiences, no doubt distracted by their own in-car activities, had no problem suspending their disbelief about the apparently trouble-free operation of the MG and Triumph sidekickmobiles).
Faster Pussycat Posters [SD455.com]
Related:
Russ Meyer, Breast Man and Car Nut, Dead at 82 [internal]