One of just 40 ever made, the two-seater classic once worth £4,000 is tipped to smash records when it goes under the hammer in London this November.
A vintage Alfa Romeo once hailed as one of the fastest cars of its era is expected to sell for up to £5.5 million at auction.
The 1937 Alfa Romeo 8C 2900 B Spider, built in the style of Zagato, is one of only 40 ever produced.
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The ultra-rare two-seater could hit 120mph in the 1930s – making it among the quickest production cars of its time.
Brand new, the motor carried a price tag of just £4,000 – around £235,000 in today’s money – meaning its potential hammer price is a staggering 1,375 times higher.

Powered by a 2.9-litre straight-8 cylinder engine, the car has been meticulously restored and is in what auctioneers describe as “spectator condition.”
Painted in a deep red and roofless, it retains the sleek silhouette that helped cement Alfa Romeo’s racing legacy.
The model set for auction is the very first B variant, originally delivered to Germany and later re-bodied with a Karosseriewerk Aug Nowack design.
It spent years in the United States before returning to Europe in 1978.

By the early 1980s, it was owned by Alfa expert David Black, who oversaw its restoration, which included fitting a 1930s Spider body believed to have been completed by Zagato for the Brussels Motor Show.
RM Sotheby’s will present the 8C Spider in Belgravia, west London, on 1 November.
With no reserve price, the pre-war icon is widely tipped to fetch its full estimate of £5.5 million.
For collectors, it’s a once-in-a-lifetime chance to own a piece of motoring history that defined both speed and style in the golden age of Alfa Romeo.
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