- Designed by Don Juan Ovidio Alesso with help from Juan Manuel Fangio as an all-Argentinian single-seater that could challenge for international honours

- Bespoke 7-litre, quad-cam, flat-12 engine, aeronautically inspired multi-tubular chassis, hand-crafted aluminium body

- Promised support and funds by the Peron government which never materialised and outmoded before its full potential could be realised

A highly gifted and innovative engineer with a passion for motorsport, Don Juan Ovidio Alesso initially conceived this enormously ambitious single-seater for domestic Formula Libre racing during the mid/late 1940s. However, as the likes of Juan Manuel Fangio, Benedict Campos and Jose Froilan Gonzales began to establish themselves on the European racing scene so the idea was floated of equipping them with a 'homegrown' machine that could fight for international honours; a challenge that Don Alesso was only too willing to accept.

Determined that its chassis, engine and body should be of Argentinian manufacture, he set to work. Influenced by contemporary aeronautical practice, the unique multi-tubular frame that Don Alesso fabricated saw several of its members double-up as oil and coolant tanks / conduits. Keen to assist with the project Fangio is understood to have sourced a set of Rudge Whitworth wire wheels and the independent front suspension from a competition Alfa Romeo. However, Don Alesso rejected the latter because he felt it would be unable to adequately support the newcomer's bespoke powerplant.

Displacing 7054cc, the flat-twelve engine in question boasted a seven-bearing crankshaft, monobloc construction, four chain-driven overhead camshafts, two valves per cylinder and six downdraught Rochester carburettors. Estimated to develop some 300bhp @ 4,200rpm, it was allied to FIAT 525 manual transmission and drove the rear wheels via a heavy-duty differential (a lighter alternative disintegrated during one of the single-seater's earliest outings). Interestingly, Don Alesso's choice of a flat-12 configuration mirrored that of Dr Ferdinand Porsche's 1939 Auto Union and 1946 Cisitalia Grand Prix engine designs (the first Ferrari flat-12 debuted in 1964).

Having won the Rafaela 500-mile race on 24th December 1950 aboard a Talbot-Lago T26C, Fangio stayed in the area to attend a fund-raising banquet for the Alesso single-seater. Hampered by a lack of funds and teething troubles with the monstrous 7-litre powerplant, progress on the Formula Libre project was slow. After a series of successful test bench runs, the engine was finally installed on November 11th 1952 with the car making its public debut at Buenos Aires' 'October 17th' Autodrome shortly thereafter. Present that day were Juan Manuel Fangio (who had helped arrange the unveiling) and Luigi Villoresi both of whom apparently tried the Alesso and praised it to 'Peronist World' magazine.

Argentinian president Juan Peron took an interest in the single-seater promising land and money but sadly neither materialised. Don Alesso continued to develop the car driving it himself on occasion before employing the services of motorcycle champion Francisco Gonzalves who achieved the single-seater's best result at the Parque Urquiza in Parana. A change in Formula Libre regulations saw the car outmoded just as it was beginning to show promise. Clothed by Don Antonio Thimental in thin-gauge steel with an alloy bonnet and originally finished in the Argentinian national colours of blue with a yellow bonnet (traces of which are still visible in places), Don Alesso's amazing creation had been mothballed by the decade's end.

Migrating to France during the 1990s, the single-seater was then bought by the late Paul Foulkes-Halbard and put on display at his Filching Manor Motor Museum. Mr Foulkes-Halbard is understood to visited Juan Manuel Fangio in Argentina to verify the car's provenance and to have planned to restore it to his former glory. Sadly, a fatal stroke in 2003 put pay to such plans. Coming to market for the first time in twenty-two years, the Alesso is said to be substantially complete though items such as the clutch, rear shock absorbers, timing wheels and instruments etc are missing.

A fascinating piece of motorsport history with connections to a driver that many consider to the greatest of all time, the Alesso will surely be a sight (and sound) to behold once restored. A future star turn at the Goodwood Festival of Speed?

PLEASE NOTE: All estimates are subject to a buyer's premium of 15% incl. VAT (@ 20%)