The 85 model City is classed as a commercial vehicle, rendering it useless for Street A,B and C.
Then for Walled classes, there isn't really enough room in them for a decent sized box and allowing for amps/batteries, plus 2dr cars have longer doors, can be good (seats move miles forward of box) and bad (bigger cabin area)
In the defence of 2dr cars, Pandas are 2drs and the guys using them are using walls as little as 10 cubes, but they are freaks too