BMW engineering was NEVER perfect. The front suspension geometry on the E21 is the perfect example. Supposedly all the engineers that designed that suspension were promptly fired before they could design another car
Also, the "Ultimate Driving Machine" refers to one car in particular and only later was used as a marketing term by the sales staff
This is the said car(s) that earned that moniker:
http://www.seriouswheels.com/pics-19...e-1280x960.jpg