For the Trial it's no contest at all for the strongest car if it's sprints or the faster circuits, but if it's the smaller/tighter ones then the City is capable of beating (no pun intended) the sweatbox even with a conventional AWD swap.
If not it could still be worth using the City if one of it's weekly chapters is to win a road race/circuit/sprint with it, any half decent player in a Beat will blow it away but we've all seen the standard of most randoms in Trials, would be worth taking a chance to complete a chapter while completing another event.