I've just got back from a holiday in Quartaria, & in a nutshell here's some observations:
Plenty of Rovers dating from the SD3 (1984-9 200) onwards. The only ones I didn't see were any 600s & 800s. I was expecting to see at least 1 Mini Moke (where were built on Portugal for a time) but the nearist was a 1990s Mini.
The smaller 1980s Opels (No Asconas or larger models) seem to survive well there, as do most French cars. I was surprised at the number of Renault 4s & Pugeot 505s still around. Even though the 2CV was built there I only spotted 2-3, though I noticed a CX & an XM & a few BX's.
Lancias are easy to spot, & I passed a Dealer near Faro Airport.
I spotted a few body styles rare here, such as a Fiat Stylo & last generation Toyota Corolla saloons. I thought I saw a Fiat Bravo / Brava estate, but it was a Palio.
Due to the tax rules there wern't many big old cars, apart from W123 Mercedes'. Also some older cars seemed to be imported, I saw at least 1 Renault 21 with old French yellow headlights.
Pre 1990s Fords seemed in short supply, compaired to other brands.




