The club has about 180 members across New Zealand, many of whom own their own Riley car.
"Clubs exist across the world. There is quite a strong Riley car club in the UK as well.
"For our rallies in New Zealand, it usually attracts three or four members from Australia and occasionally some from the UK. There won't be any this year unfortunately."
Davies said 27 members from around New Zealand will travel to the event, some coming from as far as Christchurch.
"It's a real highlight for club members this time of year."
While the event is mainly for club members who have registered for the activities, the public are invited to view the vehicles during the concourse event at the War Memorial Centre at 9am on Saturday.
"It will give the general public the opportunity to mark the cars. We'll give them a sheet of paper and they can mark the cars in the various categories."