The Rolls-Royce Sweptail, a customized coupe of superior luxury, is most likely the most expensive new car ever sold at an unfathomable $12.8 million. Designed for an unnamed customer who's clearly doing pretty well for themselves, the car has been in the works since 2013. Ironically, the car is strange looking, and this is probably because it's inspired by the Rolls-Royces of the 20's and 30's.

About the car's influences, Rolls-Royce states, "The grandeur, scale, flamboyance and drama of the 1925 Phantom I Round Door built by Jonckheere; the svelte tapering glasshouse, dramatic dash to axle proportion and up-sweep of the rear departure angle of the 1934 Phantom II Streamline Saloon by Park Ward; the elegantly falling waist-rail, swept tail coachwork of the 1934 Gurney Nutting Phantom II Two Door Light Saloon, and the flowing roofline, rising departure angle, and again the swept tail coachwork of the 1934 Park Ward 20/25 Limousine Coupé were all considered by today's Rolls-Royce designers in the creation of this very distinctive motor car." The description is clearly provided with a sense of grossly exaggerated elegance.

The Telegraph reports that the car cost around £10 million, or just over $US12.8 ($17) million at current exchange rates. The outlet also reports that it's the most expensive new car — forget about auctions or privately sold cars — ever sold, which would sound about right since the average Bugatti Chiron slots in at just under $US3 ($4) million.

But remember that if you have the money, a manufacturer will do just about anything for you. Dip your expensive, performance-oriented supercar in solid gold, if you want. McLaren even offers "almost limitless customization" on its 720S, except for T-tops. You won't get any of those.

The point is, the number that determines the "most expensive new car ever sold" is murky no matter how you look at it. The Telegraph is also one of the few outlets reporting the $US12.8 ($17)-million price, while GQ said Rolls-Royce "refused to give ... a figure, or even a hint of one."