The most prestigious of the eight is the 1950 Rolls-Royce Phantom IV State Landaulette (below), which was handed to Her Majesty The Queen, with coachwork by Hooper & Co.
It has been in the Royal Household for more than 40 years, been used on royal tours all over the world, and is expected to be sold at auction for up to £2 million.
That vehicle, used by Ms Markle and her mother Doria as they travelled from their hotel to St George's Chapel, was another of the 18 models built only for heads of state and the most notable of public figures.
A saloon version has similar mileage and is up for sale, while the final two cars in the collection are the Park Ward-built 1995 Corniche Convertible IV and 1979 Phantom VI Limousine.More news: Fed leaves key rate unchanged with U.S. economy growing at 'strong rate'
It's not the only royal Roller being offered at the September 8 auction. While very similar to the auto Meghan Markle and her mother Doria to St. George's Chapel for Meghan's wedding to Prince Harry, it does not include a built-in bar like the vehicle once owned by Princess Margaret.
There are a number of Rolls-Royce vehicles manufactured at Crewe still in existence, now under the custodianship of Bentley Motor Cars, and all will go under the hammer at the hands of Bonhams on September 8, during the Goodwood Revival Sale.
The 1960 Rolls-Royce Phantom V "High Roof" State Limousine, also included in the collection, is another that was used by the monarch.More news: The Blue Jays are trying to trade Roberto Osuna
Additionally, a 1985 Rolls-Royce "Centenary" Silver Spur Saloon used by Princess Diana is expected to sell for almost £100,000 (US$131,302). It is now on display at the Royal Yacht Britannia in Edinburgh and is expected to sell for $1.3 to $2 million.
It has large comfortable seats, big windows for viewing and that all important royal wave, and a tough perspex panel at the rear.
Bonham's auction will also include plates described as "the holy grail of registrations for any true Rolls-Royce enthusiast", RRI and RRMI.More news: Valve's card game, Artifact, releases on November 20th