How many Alvis TB21s are left in New Zealand?
Unicorn 1 in 4,674,872 on the road Built 1952 British
Updated from the NZTA Motor Vehicle Register, counted as at 31 August 2026. Recounted every month.
A two-seat open sports version of the Alvis Three Litre, sold briefly in the early 1950s. It carried over the roadster body of the earlier four-cylinder TB14, with a conventional Alvis grille, on the 3-litre six-cylinder chassis. Very few were built.
Still on the road, by model year
1 from 1952.
What Unicorn means
Spotto grades every car by how many are still registered in New Zealand. With 1 still registered, the Alvis TB21 is Unicorn: the grade for cars with fewer than 5 left.
By how many are left it ranks equal 10th of the 15 Alvis models and equal 2,668th of all 2,903 cars in Spotto's catalogue.
The six grades: Common, 8,000 or more · Uncommon, 1,200 to 7,999 · Scarce, 175 to 1,199 · Rare, 25 to 174 · Super rare, 5 to 24 · Unicorn, fewer than 5.
Seen one?
Spotto grades every car on New Zealand roads by how many are still registered, down to the generation and the badge. Log the ones you spot, build a collection, and see who else has found one.