The Bugatti Chiron was built for one key thing: speed. Now completely sold out, the Chiron remains one of the fastest production cars in the world. Spending well over $3 million requires something special and the Chiron more than delivers. But what would be the point of owning a hypercar that can surpass 260 mph if you can't attempt to go 260 mph? That's exactly how one owner felt late last year and he decided to do something about it.

Last month, we reported about a Czech Chiron owner named Radim Passer who went to Germany's famed Autobahn for a high-speed run. Treating the long stretch of highway as a private runway, Passer took off at dawn, knowing there'd be very few other vehicles out there. He was right.

Thanks to the Chiron's 8.0-liter quad-turbo W16 engine and its slippery aero design, Passer managed to hit 257 mph (414 kph). He was quite proud of that achievement but the German authorities are not happy. The Associated Press reports that Germany's Transportation Ministry has criticized Passer's high-speed run that took place between Berlin and Hannover on a 6-mile straight section.

Passer noted in his video that "Safety was a priority, so the circumstances had to be safe to go." He said visibility was fantastic. German authorities, however, remain less than pleased, stating they reject "any behavior in road traffic that leads or can lead to endangering road users. All road users must abide by the rules of the road traffic regulations."

The ministry pointed out that, despite the Autobahn's lack of speed limits, all drivers "must behave in such a way that no other person is harmed, endangered or obstructed or inconvenienced more than is unavoidable under the circumstances." Passer, who's worth an estimated $308 million, was confident everything would turn out just fine. "We thank God for the safety and good circumstances, as we were able to reach the speed of 414 km/h!" he wrote afterward.

Despite his faith, the Germans remain less than pleased but they can't legally do anything because Passer didn't technically break the law. His actions are still being frowned upon.