In 1985 it was time for another modification to an already very successful design, the Countach.
The 5000 Quatro Valvole or QV for short, brought on in 1985 an improved engine. The capacity was increased to 5.2 and 4 valves were added to every cylinder, hence the name Quatro Valvole (which literally means 4 valves in Italian) and the carburetors were moved from the sides of the engine to the top for a better airflow. This reduced the visibility in the rear to zero by creating a hump in the back. Later versions of the QV had some panels made out of Kevlar and the carburetors replaced by injection.