On the other hand, a tandem roof rack would fit on nearly any car and be cheaper than almost any SUV. I have a '93 Taurus and a Yakima rack with a tandem kit. Works fine and doesn't take up any room inside the car.

I am not sure which replies were unhelpful. Since we don't know what kind of tandem or size of tandem you have or if you're willing to consider removing the front wheel (or even the rear wheel, for that matter) there's no way of knowing if it will fit in your particular SUV. I think that suggestions to use a tape measure are very practical advice.