The Seville is about 6m long and weighs 2 tonne. It will just fit inside a 6m-long container. With triple carburettors atop a V8 engine, it makes thirsty work of most road trips.
"It sucks a bit of gas if you boot it, but it's probably doing around 22km to the gallon," Mr Thrupp said.
"They float along and are lovely to ride in. They like straight roads and don't like cornering too much. They were made for wide-open American roads. And we don't park anywhere near a supermarket."
The Seville is finished in a colour called Persian Sand, a lustrous soft pink that, even on a wet Sunday morning, looked stunning.
To say the Thrupps are Cadillac devotees is understating it. They've got another five back home, along with the 1960 Chev Impala and a 1966 Thunderbird.
Then there's their garage. It includes a replica US diner at the back, complete with period furnishings, jukebox, original cash register and milkshake machine.
"Now summer's coming, we're driving these as often as we can. If it's nice and fine, Lois will take the convertible out, pick up some of her mates and away they go," Mr Thrupp said.
Their Seville was among about 25 different Cadillacs in Wanganui for the event, lining up against Sedan de Villes, Coupe de Villes, A Fleetwood Brougham, some Eldorados and the 1906 single-cylinder Cadillac Laurie Cocker drove over from Rongotea.
