Compared to the vehicles shown at the Detroit motor show and more recently at the Australian Open tennis tournament, which were all top-spec GT models, this red Stinger appears to be a lower-spec variant - likely the four-cylinder entry-level model - and is also right-hand drive.
The Stinger snapped by a keen CarAdvice reader looks more sedate than the up-spec variant revealed earlier, doing without the chrome grille inserts, LED headlight clusters, the large alloy wheels, glass roof, and vents in the rear bumper.
However, this vehicle does retain the prominent quad-exhaust outlets, tail-light clusters, fake bonnet vents, and the radar sensor in the front grille - that's likely for the adaptive cruise control and autonomous emergency braking (AEB) systems - we've already seen in the GT show cars.
Inside, the Stinger has a very similar interior to that of the higher-spec model, though because the vehicle was locked the finer details of the cabin aren't as obvious as the exterior.
We can, however, see the floating tablet-style touchscreen infotainment system, a faux-leather stitched dashboard trim, and paddle shifters behind the steering wheel.
When it arrives in Australia later this year, the Stinger will be offered with 2.0-litre turbocharged four-cylinder petrol and 3.3-litre twin-turbo V6 petrol engines.
The smaller unit is similar to the one seen in the Optima GT, producing around 190kW of power and 353NM of torque.
Meanwhile, the pièce de résistance will be the GT flagship, developing 272kW and 510Nm of torque from its blown V6.
All models will be fitted with an eight-speed automatic as standard, sending drive to the rear wheels.
Kia Australia has since confirmed this Stinger is an engineering assessment vehicle, used to finalise local tuning.
Thanks to Mat for the photos!