With todays conditions on the Autobahn, 100 mph are more than enough to risk a temporary loss of licence.Lost in all the debate about precise numbers is what you want, and are getting.
Your car, on good fuel, very likely can make 282hp as specified. However it can only do it for say 10 seconds, Which may well be enough for your needs.
I know that a Maptun tune for 282hp with supporting hardware as specified can deliver it for 20 minutes on the autobahn, as many of there customers including me do put to the test. Very different tune and capability. If keeping your license in USA, and never spending cruising time > 100mph is the application, ten seconds of 282hp is all you will ever need, Horses for courses.
The only reason why I want to give my Saab the factory tuning kit (192 hp) is more oomph for overtaking situations - not that even the "lowly" 150 hp are bad but in this case I'd like to follow the motto "better having & not necessarily needing it than vice versa". The days of relatively riskless driving fast on the Autobahn are over here in Germany, and I leave the sprints from traffic light to traffic light to the proles.