The race track testing could mean that this is a high-end performance variant of the current car, although the heavy camo suggests that much of the car has been redesigned as well.
The 2013 Sorento was announced with three engine choices: a 2.4-liter four-cylinder MPI with 175 hp and 169 lb-ft of torque, a 2.4-liter four-cylinder GDI with 191 hp and 181 lb-ft of torque and a 3.5-liter V6 with 276 hp and 248 lb-ft of torque. The Sorento however may follow in the foosteps of the smaller Sportage and also offer a turbo charged option. A hybrid variant is also possible, and would be an easy retrofit considering the company already has a new hybrid system that runs in the Optima.
Gas is great, but another likely possibility would be a diesel variant. A week ago Kia teased the idea of a U.S. diesel car by asking if anyone would buy it. An oil burner is already available in Europe, but demand for more efficient engines in the States could drive the brand to market one in North America.
The rear end of this test Sorento is very heavily camouflaged, though we can still make out a difference in the taillight graphics. Compared to our last batch of spy photos, this Sorento has a lot more to hide, so watch for some major changes to the style.