愚問幾條(關於北美及大陸)

大家好, 小弟有幾條問題好想問(唔知有冇貼錯板)
1. 小弟想問點解新MCI(ex: J4500)好似只係得北美有?
2. 美國點解冇rosa/coaster而要用Ford/Chevy小巴?
3. 點解好似美國coach唔多用康偈?
4. 好似聽講美國有中國客車入口, 咁點解係安源/BCI而唔係香港常見嘅金龍同宇/中通, 五洲龍等?
5. 點解美國好似細size coach多數前置engine?
6. 美國coach有咩常見engine/transmission配撘?
7. 其實五洲龍有咩咁差? 因為小弟見到佢地好似都係用cat engine

希望大家可以幫到我, 先謝

4. BCI is a Australian company who also sell coaches in North America as well
6 Detroit Series 60 with Allison transmissions