Named to honor the company's twenty-fifth anniversary, in 1988, the 25th Anniversary Countach, although mechanically very similar to the 5000QV, sported considerable restyling. Notably, restyling, enlargement and extension of the rear 'air-box' intake-ducts was among other refinements undertaken. Various redevelopments to the rear-end were made; most notably the introduction of a rear bumper extending outwardly from the lower-portion.
The 25th Anniversary Edition was the most refined and possibly the fastest edition of the Lamborghini Countach; it was produced up until 1990 before being superseded by the Lamborghini Diablo.