Question: The Bentley Continental Flying Spur shares its platform with a car described by Volkswagen as what ?

Context paragraphs:
Fairmount station: Fairmount is a subway station in the Francisville section of North Philadelphia, Pennsylvania.  It is served by SEPTA's Broad Street Line (local tracks) and the Broad-Ridge Spur.  There are three separate platforms; currently the Broad-Ridge Spur and Broad Street Line (BSL) northbound platforms connect inside the faregates, but the BSL's southbound platform cannot be reached from the other two without exiting.  At one point in time there was a connection to Broad-Ridge Spur trains from the southbound platform of the Broad Street Main Line.  The entrance can be seen at platform level heading south towards the end of the platform; it is a sealed off entrance painted black.  Travelers wishing to switch between the Broad-Ridge Spur and the southbound BSL, or to switch to or from the BSL Express line, should connect at Girard.  The Broad-Ridge Spur platform is shortened and can only accommodate short 2-car trains; the unused part of the platform is visible from passing trains and is covered in layers of graffiti.  Fairmount Station on the Broad-Ridge Spur has a full mezzanine concourse extending from Wallace Street to Ridge Avenue, now abandoned.

Bentley Brooklands Coupé: The Bentley Brooklands Coupé is a coupe version of the Bentley Arnage.  As a hand-assembled car made in very small numbers, employing traditional coach-building techniques and craftsmanship skills in wood and leather, the Brooklands Coupé is the true successor to the discontinued Bentley Continental R and T. Lifetime production is planned for 550 cars, and deliveries started in the first half of 2008.

Bentley Continental GT: The Bentley Continental GT is a grand tourer produced by the British automaker Bentley Motors since 2003.  It was the first car released by Bentley under Volkswagen AG-management after their acquisition of the company in 1998, and the first ever Bentley to employ "mass production" manufacturing techniques.  It shares a platform with the Volkswagen Phaeton.

Bentley Continental Flying Spur (2005): The Bentley Continental Flying Spur is the four-door saloon variant of the Bentley Continental GT coupé.  The Bentley Continental Flying Spur was introduced in 2005.  This car shares its platform with the Volkswagen Phaeton, and its powertrain components are related to those on the Audi A8 and S8.  It was designed by the same team as produced the Continental GT and Continental GTC.

GM 4L80-E transmission: The 4L80-E (and similar 4L85-E) was a series of automatic transmissions from General Motors.  Designed for longitudinal engine configurations, the series included 4 forward gears.  It was an evolution of the Turbo-Hydramatic 400, first produced in October, 1963.  4L80-Es were optioned only in Chevrolet/GMC pickups, vans, and commercial vehicles, and the Hummer H1.  It was also adopted by Rolls Royce in 1991 and modified, after extensive testing, and used initially in the Bentley Continental R, and subsequently other Rolls Royce and Bentley vehicles.

Volkswagen Phaeton: The Volkswagen Phaeton (   ) ("Typ" 3D) is a full-size (F-segment in Europe) luxury sedan/saloon manufactured by German automaker Volkswagen, described by Volkswagen as their "premium class" vehicle.  Introduced at the 2002 Geneva Motor Show, the Phaeton was marketed worldwide.  Sales in North America ended in 2006.  Sales globally ended in 2016.

Bentley Azure: The Bentley Azure is a large, four seater convertible built by Bentley Motors Limited at its factory in Crewe, England.  The model debuted in 1995 on the Bentley Continental R platform and was produced until 2003.  After a three-year break a completely new version powered by a significantly updated engine and riding on the newer Arnage platform debuted in 2006.  According to 2009 research by internet company Yahoo!, the Azure is the fourth most fuel consuming car on sale in the United Kingdom.

Bentley Continental Flying Spur: Bentleys have worn the Continental Flying Spur name on two quite different classes of four-door car.

Steven Kane: Steven Kane (born 5 June 1980) is a British racing driver who currently competes in the Blancpain Endurance Series and Avon Tyres British GT Championship for M-Sport Bentley driving a Bentley Continental GT3.

Bentley Continental R: The Bentley Continental R was a luxury coupé made by Bentley from 1991 to 2003.  It was the first Bentley to feature a body not shared with a Rolls-Royce model since the S3 Continental of 1965, the first to use the GM 4L80-E transmission, and the fastest, most expensive, and most powerful Bentley of its day.  It was also the most expensive production car in the world at launch.  A convertible derivative, the Bentley Azure, was launched in 1995.

Supporting paragraphs: Bentley Continental Flying Spur (2005) Volkswagen Phaeton
Answer: their "premium class" vehicle