Road & Track published an extremely thorough comparison of the BMW M3 Sport Evolution, the Audi Coupe S2 and Mercedes 190E 2.5-16 Evo II from October 1991. An absolute gem of automotive journalism if you ask me.
Each is significant as it represents the forefront of its maker’s technological abilities, from computerized engine-management systems to aerodynamics. Each is also a limited-production car that may or may not ever see American roads deserving of its talent. And so it was that we traveled to Germany and assembled three of the best and brightest ” something-extra” cars that the country has to offer. We poked, prodded, tested and pushed them on a race track, experienced them flat-out on the last public frontier of high-speed driving—the German Autobahn—and enjoyed them on the lovely secondary and tertiary roads in the southern province of Baden-Wiirttemberg.
Source: Road & Track