1997 Rolls-royce Silver Spirit/spur/dawn Total Lux on 2040-cars

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Former Princess Diana Rolls-Royce being auctioned for charity [w/video]

While it isn't that uncommon to see cars belonging to celebrities and dignitaries roll across the auction block these days, this car is a little extra special. This particular 1979 Rolls-Royce Silver Shadow was the car that Prince Charles and Princess Diana arrived at the White House in during a visit in 1985. As some added trivia, this was also the visit where Princess Di cut a rug with none other than John Travolta.
Volo Auto Museum will be auctioning off this piece of American and British history on November 9th - exactly 27 years from Princess Di's White House visit. According to the auction listing, this armored Silver Shadow was the official car of the UK's embassy, and it has been valued at around $2 million by the Berman Museum of History. The auction will have no reserve with some of the proceeds going to the Children with Cancer UK charity that Princess Diana started in 1988.
Scroll down for more information about this car and its auction as well as a video showing Prince Charles and Princess Diana arriving at the White House in the car back in 1985.

Top horsepower-per-dollar cars in 2017

Bang for the buck. That quasi-scientific statistic is bandied about by motor heads everywhere from classrooms to barrooms, though the truth of the matter is that it's exceedingly complex to measure. A fair performance-per-dollar index would include something like cross-referencing MSRP (Manufacturers Suggested Retail Price) with point-to-point times on a track or driving route, which is obviously hard to do comprehensively. But, for the sheer joy of talking about cars and playing with a big spreadsheet, there's always the horsepower-per-dollar index, which is more straightforward, albeit hilariously flawed. There are vagaries even with this simple formula, of course: MSRP for vehicles can change at a moment's notice, to say nothing of the bottom-line shifting that happens with local deals or showroom negotiation. For this list we're running with the straight MSRP wherever possible, and as recently reported as we can get it. All the vehicles on this list are 2017 models, and all trims are reported where the lowest price and differing power levels intersect. Some choices were made for personal preference and some for sanity, avoiding things like all 48 trim levels of the Ford Transit, all with the same horsepower). If this list were a simple top ten, or even a top fifty, you'd be bored to tears with all the red, white and blue that is represented. Following perfectly with conventional wisdom, American cars really do lead the world where hp/$ is concerned. So, for the sake of variety (and the sheer joy of seeing a minivan 'win' one round of this thing) I've sorted out some top five and bottom five lists for broad power categories. Let's dive in. Less Than 100 Horsepower Okay, okay, this is hardly a category we'll grant you. But we've often tried to click off all the sub-100-hp cars on sale in the US, and making this list gave us an excuse. It also illustrates that none of these smallish vehicles bring cheap horsepower to the table - for that you'll need a motorcycle. The segment-leading Chevy Spark (above) asks just over $139 for each hp, and that Smart Fortwo Electric Drive has hp on sale for about the same price as its very distant family cousin, the Mercedes-Benz SL65 AMG (insert your favorite Smart joke here... we know you want to).

Rolls-Royce readying Wraith convertible

For seven years, Rolls-Royce got by on the Phantom line alone, expanding on the original saloon with a long-wheelbase version, a coupe and the convertible. But now that the Ghost is part of the family, Goodwood seems to be following a similar expansion.
What started with the Ghost sedan has since been joined by the extended-wheelbase model and the Wraith fastback coupe. And now we're receiving spy shots of a Wraith-based convertible undergoing testing.
Potentially to be called the Wraith Drophead Coupe like its larger Phantom-based counterpart, the cabrio is likely to borrow much from the Wraith fastback - including its 6.6-liter twin-turbo V12 producing 624 horsepower and 590 pound-feet of torque - but with a folding cloth roof mechanism to let the wind and engine note in, although the prototype pictured here is wearing a makeshift hardtop.