In 1998, Volkswagen purchased rights to Bugatti (see here), and commissioned ItalDesign (led by Giogetto Giugiaro) to create design concepts. One of these is the subject of this post, the Bugatti EB218 of 1999.
To put the EB218 into one context, here are two postwar closed-car Bugatti Type 101 designs (note that the rears of the cars are reflected in mirrors):
Now let's take a look at the EB218.
EB112, that had a continuous windsplit and a divided backlight somewhat in the vein of the classic 1963 Corvette Sting Ray coupé.
What I do not know is whether or not Giugiaro was handed a package specification that gave him little freedom in terms of dimensions. That possible factor aside, at the time the car was designed, large greenhouses with plenty of glass area were fashionable. So maybe he wanted to create a design that would be acceptable under current market conditions.