Well that may be true also, but since I am almost sure that I saw the numbers in the same AlfaRomeo Usa website, i just did a google search and found in a motortrend.com article the following:
"Alfa Romeo is claiming that the Stelvio Q4 will hustle to 60 mph in a super-quick 3.6 seconds. When it first announced the car Alfa had stated 3.9 seconds to 60 mph, but thanks to some software refiddling by chief engineer Andrea Zizak and his team, they managed to knock off 0.3 seconds If true, that’s quicker than a four-leaf Giulia by 0.2 second."
Probably they will refiddle the software in the Giulia too. Although since the Stelvio is all wheel drive thats an advantage.
I imagine that if the test driver is super skinny that will help too!!!.....Lol