InternationalAuto:
It wasn't the spelling errors (or the long-winded way of saying "Ettore's Bugatti was French, Artioli's was Italian, VW's is French") that bothered me. The EB118 was a four-door sedan (saloon) and it wasn't exactly a "V18" because it had three banks of 6-cylinders each. The EB218 was a 2-door version of the EB118 (which, itself, was an evolution of the EB112). These two were followed by a third concept (giving up the obvious EB318 to prevent problems with BMW) which was a Lamborghini-based 2-seater named 18/3 Chiron (still powered by the 6255cc W18). The fourth in the series of VW-built concepts was the 18/4 Veyron. With the problems associated with the 18-cylinder engine, the production version of the Veyron is the 16/4, referring to its 16-cylinder engine (now in two banks of 15-degree V8s).
I've done a little research on the history of "modern" Bugattis.