Your short answer is no, they won't let you. However if you have learnt how to drive in an SUV and have only ever driven one (which I highly doubt), you might be able to persuade them into letting you use it. However you have a higher chance of them letting you take it in a Lamborghini, I recommend you just book a car with them for the road test. Also while you're on your test try to get stuck behind slow moving vehicles and at intersections that take along time to get through. They won't mark you down and this will greatly reduce the amount of time you have to fill during your test. Remember it's only 45 minutes so try and go as slow as possible without getting marked off for obstructing traffic.