There's actually 5 (or maybe 6) 4.0 B8's. Check Alpina archive for more information on the cars
http://www.alpina-archive.com/?cat=399
Check out the totals for the 4.6's as well. There were less than 93 tourings. The sedan (limo) is the most common with 93 made. A total of 221 4.6 B8's were made.