Though ultimately not as well known as Alpina, AC Schnitzer replaced the more famous brand a the defacto factory race team in the late 1970s and 1980s. To capitalize on their success at the race track (including the successful campaigns in the DTM), in 1987 AC Schnitzer launched their first brand-specific model based upon the new E32. That was followed by a more sporty E30-based model, dubbed the ACS3 Sport in 1989. It was available based upon either a normal 3-series, or those with a bunch of dough could opt to allow Schnitzer to modify their prized M3. And modify it did; subtle changes outside included revised mirrors, a light change to the rear end and a single-wiper conversion to really channel the DTM spirit. Wheels were either 17″ multi-piece Schnitzer design, or the ever-popular BBS RS model in 16″x8 or 9. As Alpina did, Schnitzer included their own steering wheel (4 options available), a numbered plaque, bespoke suspension 20mm lower than the standard ride height, and a unique rectangular-tipped exhaust. However, the real treat was the full 2.5 conversion, which really packed some extra power in the S14. Schnitzer brought the total displacement to 2,431 cc – just shy of the 2,467 BMW themselves would produce in the 1990 Sport Evolution. Coupled with a revised DME, the S3 Sport 2.5 produced an impressive 245 horsepower. They are exceedingly rare to come across, but our reader Daniel spotted this fully converted 1988 example for sale: