For me, it was my 1997 Citroen Saxo Tour De Corse. Only 20 made during that year. Fast as feck but blew up most of the time I owned it.
Looked similar to this. Modified by LAD motorsport and blew up. The sent to another performance specialist in Nottingham who put a brand new engine and tuned. That blew up along with the gearbox. I had a 7 month legal case with Citroen, Manchester who refused responsibility despite it being sold through Citroen with its warranty.