11. Jaguar XJ
There seems to be something amiss when it comes to the weird designs of luxury sedans. The Audi 8 had noise issues and the BMW 7-series suffers from goiter problems, so it makes no sense why the Jaguar XJ has been the miserable failure its become. From the sexy appearance made from lightweight aluminum to the business-class rear accommodations, the sedan honestly has everything going for it. Sadly, it only sold a miserable 4,300 units, despite being more than $20,000 cheaper than a comparable Mercedes-Benz. Madness, we say!