I guess I'd have to put American Graffiti up first, liked Bullitt too, and Diamonds are Forever....most of what's already been mentioned. The problem for me, is the "non-realistic movie car" stigma that I get when I see some of the movies....like the switch to turn on and off the blower in Mad Max, or the wheelstanding Dodge Charger in Fast and Furious. Most people don't care or don't know that's not how things work in reality, but I grimace when I see it. Being an ex-aircraft mechanic, I roll my eyes when someone in a movie just jumps into a helicopter, starts it up immediately, like it has a key to start it, rotors spinning, and flys away....no ignitors snapping, no turbine spooling up, etc. I though the best part of American Graffiti II was the drag racing segments, but then again, Moroso valve covers on aluminum heads on a small block Chevy in 1965, right off the bat, made me think "Geeeezus, find someone who knows about the topic before you shoot the film!"
Having said all that, I dug the 007 movie "Goldfinger", where the Aston-Martin had all those gimmicks...ejection seat, machine guns, oil slick, bullet-proof shield behind rear window, etc. That was one of the things those James Bond movies were known for, is the special toys and weapons. Unrealistic perhaps, but befitting the worlds foremost secret agent.