Even within Alfa Romeo itself, the ES30 model was nicknamed “Il Mostro” (meaning “the monster”), a moniker the sporty car owed solely to its styling. In fact, the “Experimental Sportscar” with its three-litre engine (hence ES30) looked very unusual but was actually a docile car that was easy to handle. It was not Zagato – responsible in earlier years for beauties such as the Aston Martin DB 4 GT Zagato or the Alfa Romeo Giulietta Sprint Zagato – that had been commissioned by the Fiat Group, to which Alfa Romeo had belonged since 1986, to design the new coupé, but rather the company’s own design centre. There, Robert Opron and Antonio Castellana took on the task. They designed an uncompromising coupé with a high degree of recognisability. The engineers used the Alfa Romeo 75 in Group A/IMSA specification as the basis for the car, which – thanks to CAD – was developed from concept to production-ready sports car in just nineteen months. The 251-centimetre wheelbase was left unchanged, as was the layout of the engine (front) and gearbox (rear, transaxle). Naturally, they did not fit the racing engine, but rather a three-litre V6 from the Alfa Romeo 75 America, tuned to 210 hp. This rare Alfa Romeo coupé – only around 1’000 were built – was handed over to its first owner from Basel by Alfa Romeo (Svizzera) SA in Agno on 14 September 1990. He enjoyed driving his SZ No. 057, with its powerful 210 hp 3-litre V6, regularly until he sold it to the current owner in 2014 with around 56’000 kilometers on the clock. As the complete service history book shows, the current owner has also given his exotic car the care it deserves. In 2017, he had a homologated TCPM stainless steel exhaust system fitted. The last major service, including replacement of the timing belt and water pump as well as an overhaul of the hydraulic belt tensioners, was carried out in December 2020 at 60’417 km by a well-known Alfa Romeo specialist. All maintenance records since 2014 are available and will be handed over with the vehicle, along with the original owner’s handbook. This SZ is a two-owners car, has covered just under 61’000 km and is in very good condition. The last veteran MOT was carried out in May 2026.