BMW 1 Series tii Concept Preview -- 2008 Chicago Auto Show: Long time fans of the Roundel logo will recognize the tii suffix as being one that graced the later model 2002 sedan of the 1970s. BMW has made no secret that it wants the 1 Series to be viewed as a car in the same vein as the 2002 – a light, agile, quick two-door sedan. That’s the goal with appending tii to the end of a 1 Series concept making its North American debut at the 2008 Chicago Auto Show. The emphasis here is on weight reduction and aerodynamics, along with a white/carbon/blue tri-color design to set it apart.