The oldest car was a 1906 Darracq that has had one owner since it was bought new. The most recent were a brand new Ford Mustang and Holden Commodore - and there was something to please everyone.
"There were petrolheads that just love the dragsters and another person who loved the 1938 Morris Roadster."
People found it difficult to tell Mr Palmer their favourites.
"They said "Oh I could name about six" - and that's just the ladies."
The show and Motor Trade Association (MTA) dinner cost about $60,000 all up, and were supported by advertisers. About 200 people went to the dinner at the Whanganui racecourse.
They heard a speaker from the MTA and danced to music from Freddie Flash and the Firebirds.
The events were organised by about eight people from the association's local executive. It has previously held a show of race cars and another of American muscle cars.
This year's show could not have been put together without the help of the owners.
"They're so generous with their time, and they just love showing the cars," Mr Palmer said.