I don't doubt a BX would be less well equipped than a Mercedes sedan, but to say it's on par with a Hyundai Sonata seems an exaggeration when you consider Citroen's focus on comfortable cars. Plus, on most crappy European country/city roads, there is no doubt the BX would beat just about any conventional steel spring equipped car. Also, how exactly were diesels niche in early 90s Britain? Most European cars already had diesel options at the time, and they were getting very popular. That whole Top Gear video is about them.