poorlittle
第19楼2007/09/26
Agree.
Formal translation is automobile exhibition.
(see http://www.motorcarnival.com/)
Motor Show is also acceptable (motor is a short form of motorcar), this even may be more contemporary.
(see the websites in Hong Kong and British : http://www.agp.com.hk/exh.htm
http://www.britishmotorshow.co.uk/)