Yes it's actually 2040kg to qualify and anything with 4WD qualifies as well as panel vans with seats and load space as long as they satisfy criteria such as windows and that 1/3 length of vehicle interior is transverse seating.
RR sport is a car and I wouldn't be at all surprised if it didn't qualify as a DPV because of weight. We had one at work that was heavily abused towing plant trailers until the driver boiled it dry at
330k miles.DPV is only really useful for pickups and 4WD commercials to allow for higher speed limits on dual carriageways, plus more available MOT stations.
AJH