Definitely not Power Rangers.
The one model I used to own had a Dodge Viper-esque sports car as the head, the bumper became the mouth, the car seats rose up behind the windscreen to form ears, and the rest just folded at a right angle a pegged into the main torso car.
I seem to remember that they had no actual feet or legs, but a unipod of sorts.
I've been looking for images all over the interwebs, but to no avail.