Simply my idea is to get the front or back motor a generator the recharge the buttery. Let say we're getting back 60% (because of the wheel spinning) that could jump from 300 to 480 or plus. And you control 4wd high torque or 2wd butter Distance.I haven't did any research so it may get more.
One last wish can you Agent get it to Middle East / UAE. We have a city with lest co2 in the world (Masdar City) and many world record in dubai and many Landscapes ( Desirt, mountens, Beach .....etc ) tesla I am Waiting for you.