One of the best collections of Maseratis - certainly in this country – is to be auctioned at the Goodwood Revival by Bonhams in September.

The seller is Anthony Hartley, who is a well-known Maserati connoisseur, and has owned, rebuilt and even re-created Maseratis since the 1950s. His collection is expected to sell for several million pounds.

Leading the pack is a unique 1929 Maserati Tipo 26M four-seater sports racing car with Brooklands and RAC Tourist Trophy racing pedigree. Estimated to fetch between £1.8 and £2.2 million, the car has been owned by the family for 60 years and has been restored and campaigned over a 30-year period. The two-seater sister car also in the collection is expected to sell for between £400,000 and £600,000. Anthony Hartley found the car in South Africa in the 1970s and, in the following years, carried out a painstaking re-build and restoration, tracking down many of the original components.

Also in the collection is a V4 16-cylinder Grand Prix car replica (estimate £400,000 - £500,000) that has been much-admired on the Maserati Club circuit. Built from scratch by Mr Hartley, it is a perfect copy of one of the most awe-inspiring Grand Prix racing cars ever made – "the Sedici Cilindri" – that was capable of speeds of up to 170mph in the 1920s.

A 1955 Maserati A6G2000 Coupe, coachwork by Allemano, also in the collection is expected to fetch between £200,000 and £250,000 at the sale.

Malcolm Barber, Bonhams Group CEO, said: "Anthony Hartley is a knowledgeable engineer and craftsman who has researched the Maserati marque, followed the work of the four Maserati brothers and in some cases continued their evolution."