A "turbocharged model" refers to a vehicle that has an extra power boost provided by a device called a turbocharger. This helps the car to accelerate quickly and perform better overall. Full definition
In turbocharged models, watch for signs of oil starvation at the turbo itself, and ask to maintenance records to check that the proper grade of oil was used at every oil change. (autofocus.ca)
The downside is that the update doesn't include an option for something other than a CVT for turbocharged models. (topspeed.com)