Audi has bought Abba Kogan's Auto Union D Type to double the number of the model on its fleet.
The 1939 twin-supercharged two-times GP winner is one of the famed Paul Karassik cars rescued from behind the Iron Curtain when Zwickau was occupied by the Soviets after WW2.
The deal means that Audi now owns all three of the Auto Unions recovered from the former USSR.
Thomas Frank, head of Audi Tradition, said: “Twenty years ago we would never have dreamed that such a thing would be possible!
"This is one of the most emotional moments in our heritage work for AUDI AG – we have come full circle.”
As well as the two “Karassik cars”, the company's collection includes the famous hillclimb car driven by Hans Stuck, the Auto Union Type C/D.
Some interesting background from Audi:
The Silver Arrow legend was born in the 1930s. In 1934, Auto Union and Mercedes-Benz appeared on the international motor racing scene with German racing cars of totally new design, with a silver finish and futuristic appearance, and were immediately successful. Whereas Mercedes-Benz relied on conventional front-engined cars, Auto Union placed the engine behind the driver – the layout that is still a standard feature of today’s Formula One cars. The two manufacturers dominated racing on Europe’s Grand Prix circuits without serious opposition until the outbreak of the Second World War in 1939.