There is no questioning that the Bugatti Vision Gran Turismo is the most extreme car crafted by the French automaker. It was originally developed as a concept for the Gran Turismo video game series, but a real-life example of the car was unveiled at IAA 2015.

And now, for all of those who thought that the vehicle at IAA was a shell, we present to you a video of the Bugatti Vision GT’s engine. ProDriver CZ was on hand for when Bugatti started up the fully-functioning concept car and followed it until it was loaded up. To say this car sounds amazing is an understatement. In fact, I wouldn’t be surprised if people consider this the best sounding Bugatti, ever.

Check out the video below for just about five minutes of pure engine sounds.