Volvo seems to be up to something interesting. Spotted in the wilds of some urban parking lot is this mutant of an XC90 test mule. Hoisted above its rear cargo area with a one-off support system is a steel pedestal presumably holding extra weight. But that’s not the biggest change. No, this experimental vehicle has a lengthened wheelbase. Its rear axle has been pushed rearward, requiring Volvo engineers to cut a larger wheel well into the XC90’s body. This begs the question: what is Volvo testing here?