The Alfa Romeo SZ (Sprint Zagato) or ES-30 (Experimental Sportscar 3.0 litre) is a high-performance limited-production sports car built between 1989 and 1991 by a partnership between Centro Stile Zagato, Centro Stile Alfa Romeo and Centro Stile Fiat. It was unveiled as the ES-30 at the 1989 Geneva Motor Show as a prototype by Zagato, although the car was mainly built by them – not designed mechanically.
Alfa Romeo RZ
A convertible version of the SZ, the RZ (for Roadster Zagato), was produced from 1992 until December 1994. Although almost identical to look at, the two cars had completely different body panels save for the front wings and boot.
– wikipedia