Lotec Sirius
The Sirius is one of the most obscure European supercars. Lotec produced it in the early 2000s. The prototype caused much attention when it was first shown in 2001, but ever since, news about this crazy supercar was scarce. Some say that only two examples left the factory, and some say that Sirius never progressed beyond the prototype stage (via Below The Radar).
However, the Sirius is still one of the most powerful and interesting machines out there. The heart is a twin-turbo Mercedes V12 engine that produces around 1300 HP. The Sirius is unbelievably fast with a five-speed manual transmission and just 2800 pounds of curb weight. The 0 to 60 mph sprint takes less than 3.7 seconds and the top speed is an amazing 285 mph.