1954 Alfa Romeo 2000 Sportiva Concepts

The Alfa Romeo 2000 Sportiva was a 2 litre sports car concept developed in the early 1950s. It was designed by Franco Scaglione from Bertone, two coupes and two spiders (roadsters) were made. The car was intended to go mass production but that never happened. 

Power of the Sportiva concept came from a two-litre version of the 1900 engine, fitted with hemispherical combustion chambers. Like many contemporary Formula 1 racers, it was fitted with a DeDion axle at the rear. The engine produced 138 PS (101 kW; 136 hp), that gave top speed of 220 km/h (137 mph). The all aluminum body sits in a spaceframe chassis (seen also in Disco Volante). (wikipedia & ultimatecarpage.com)

Alfa Romeo 2000 Sportiva Coupe Concept

Chassis AR1900S 00003

This is the first of the two 2000 Sportivas clothed by Bertone with a Sergio Scaglione styled Coupe body. Finished in silver, it was retained by the factory together with the sister car. The latter, painted red, was eventually traded with a private collector for one of the earliest Alfa Romeos built. Today, chassis 00003 is still owned by Alfa Romeo is on display in the Museo Storico. (ultimatecarpage.com)

Chassis AR1900S 00004

This car was rarely seen outside of Portello until the early 1970s. 

Alfa Romeo 2000 Sportiva Spider Concept

(Photos from autowp.ru, ultimatecarpage.com & supercars.net)