It seems that the RWD Stinger GTs with shift-by-wire, the LSD, and launch control are consistently running 12.7s in the quarter mile. This is also the only Stinger variant Ive been noticing dyno claims being around 340-350 hp to the rear wheels. Those claims are appearing pretty credible in real world tests.

The V6 variants (whether AWD, w/o LSD, or w/o shift-by-wire) all seem to be nearly 10% less potent when it comes to power. Torque output has been consistent in all V6 variants.

That top video against the Vette is the fastest Ive seen a Stinger move.

This video below shows the same Stinger consistently running around the low side of 12.7s.

Here are two reviews which clocked 12.79s quarter mile runs.

All in all, if you are in the US then the RWD Stinger GT2 can be considered a direct competitor to the 400 hp Infiniti Q50 Red Sport. Itā€™s within a tenth of a second of that car. The other GT variants (especially with AWD) are exactly as they appear on paper, quick but around 13.1 seconds in the quarter mile. Pretty hefty gap!

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This also means that the upcoming US special edition Sunset Yellow Stinger GT (a base GT with the LSD added) could be as quick as that 12.6s Stinger. Basically, a Kia that fits in with the Charger, Mustang, and Chevy SS. A Korean pony hatch, which is what the car is. Ignore the premium brand marketing fluff.

If you wait until this Spring and dont mind a yellow hatchback without a sunroof then you can essentially get something that matches an Audi S5 or Q50 RdSp in performance (while being the size of a Lexus GS) for around $40,000.

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Let me also mention that there is an internal parts upgrade coming to the 3.3t V6 through Hyundaiā€™s Smart Stream engine revisions. Next model year the Lambda V6 family will get those revisions which means the 3.3t will be a better performing engine even though the power ratings will not change.

From Kelley Blue Book (they may have confirmed that 3.8 liter twin-turbo V6 that I speculated about a year ago):

Updates to the twin-turbo 3.3 include an air-cooled intercooler, high pressure direct injection, high energy ignition, redesigned combustion chambers, reduced internal friction, electronically-controlled thermostat, sodium-filled exhaust valves (a V-6 first, according to Hyundai), increased exhaust gas recirculation, and new cylinder heads integrated with their exhaust manifolds. Output remains the sameā€”365 horsepower, 376 lb-ft of torqueā€”but efficiency improves.

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I honestly feel better now that I know why the performance of the Stinger GT was so inconsistent. I was going to warn everyone that there may have been a boost or injector pressure issue with the V6 but it looks like the powertrain is consistent and solid. There just happens to be one variant which over achieves substantially.