As always, if you want to compare either of these with other speedy SUVs, be sure to try out our comparison tools.
As far as outright speed, both SUVs are surprisingly close. The Trackhawk is just a bit quicker in a straight line, hitting 60 mph in just 3.5 seconds as opposed to the Alfa's 3.9. The Jeep's 180-mph top speed is also 3-mph quicker than the Alfa. But neither of these differences is especially huge. What makes this interesting is how different the paths each SUV takes to get to its results.
The Trackhawk accomplishes the task with pure grunt. It has Dodge's Hellcat supercharged 6.2-liter V8 making 707 horsepower and 645 pound-feet of torque to overcome its hefty 5,363-pound body. The Alfa, on the other hand, makes do with less power and torque, 505 and 443, respectively, from its twin-turbocharged 2.9-liter V6. It has less weight, though. Exactly how much less we're not sure, since Alfa hasn't revealed that number, but a regular Stelvio weighs right around 4,000 pounds, so we would guess the weight is similar, possibly a little more.
The differences in how each SUV achieves its performance should result in pretty different driving characteristics, and probably different buyers. Each SUV's bragging points also indicates this. The Trackhawk boasts an impressive 11.6-second claimed quarter-mile time, something that American muscle car fans everywhere care about. The Alfa brags about how it's the fastest production SUV to lap the Nürburgring, something sure to impress fans of foreign cars and those that value handling over straight-line performance. So really, although these two SUVs have performance similarities, they're also very different, and the right one for you depends on what you value.
Also, as an afterthought, we wonder if the guys that attempted a Viper record at the 'Ring would be up for trying to break the Alfa time with the Jeep. And maybe Alfa should try a few runs at the drag strip.