Renault Clio Sport V6
One of the craziest V6 installations ever performed on a production car is definitely the Clio Sport V6. This is basically a rally car for the street with a V6 engine mounted behind the driver, literally in the interior of a small city car, which Clio is. The 3.0-liter V6 delivers 255 hp and sends power to the rear wheels. The driver sits just in front of the engine, and magazine testers described the whole package as “ludicrous.”
This is far from the standard model, a typical and boring European economy car. But by moving the V6 behind the driver, adding a wider track, and many really goodies, the Clio is turned into a monster (via Road and Track).