The best answer to this question is not which specific make and model, but rather which type of vehicle in a broader sense. And with that in mind, we’d have to suggest a smaller SUV as being a good choice for a lot of people with the hips and knees you’ve just described. Forget all the marketing hoop-la about SUVs, and instead concentrate on the fact that they’re usually not much (if any) bigger than the conventional hatchback on which they’re based in terms of their footprint. But where they are larger is in the height dimension and that means the seats are simply higher up off the ground, making them a lot easier to step into and out of. The rest of the news is very good, too, because there really isn’t a single car-maker that now doesn’t have a small or compact SUV in its showrooms. You really are spoiled for choice, so take the time to make a short-list of the cars that have the other features and specifications that you like, and then go shopping. Don’t forget to check that the car isn’t too high off the ground for you, that you can easily operate the tailgate and that the doors open wide enough to make the most of that easy access.