I was fortunate enough to import these and the SS's when the Show & Display law had just been created. You can thank Bill Gates and his 959 for that. I was also fortunate to work on XJ220's, F40's, F50's, and a shit ton of 360's and 550's.
Italian for a short time as Ettore himself was born in Milan then technically German as Molsheim where the Bugatti models are produced to this very day was once part of Germany but it's been and still is a French company for most of its existence.
It’s 2 independent engines with 2 turbos on each hence the 2x of everything. Each engine had its own fuel tank hence it was crucial to top the car up on both sides evenly.