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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).

Mansory-tuned Rolls-Royce Cullinan is dubious decadence

German tuner Mansory doesn't do subtle, but its latest take on the Rolls-Royce Cullinan goes above and beyond in the flamboyance department. It celebrated the opening of its first showroom in Dubai by giving the British SUV a love-it-or-hate-it redesign inside and out. Nearly every part of the Cullinan's exterior has been modified. Mansory installed a full body kit that adds a deeper front bumper with extra air intakes and a splitter, vents chiseled into the fenders, side skirts, a spoiler above the rear window, and a sizeable rear diffuser. Flared wheel arches cover 24-inch forged wheels, and many of the exterior add-ons feature a black, gray, and white finish that almost looks like granite, a resemblance we're guessing is intentional. And, don't look for chrome: The bright bits were made black to give the SUV a more sinister look. Inside, the granite-esque finish appears on most of the trim pieces, and Mansory fitted leather upholstery with a wave-like motif on the door panels and on the center consoles — there are two in the Cullinan. The passenger sitting in the back enjoy individual power-adjustable seats upholstered in different colors, tray tables integrated into the front seatbacks, and an outline of the United Arab Emirates in the headliner. The same outline is stitched into the rear headrests and into the seatbelts, which also gain a white Mansory-branded stripe. Mansory didn't publish precise technical specifications, but we know that it didn't leave the drivetrain untouched. It quotes an output of 610 horsepower and 701 pound-feet of torque, while the stock Cullinan's 6.75-liter V12 posts 563 and 627, respectively. Another detail that hasn't been released yet is pricing. But, if you need to ask, odds are you're not the kind of customer that Mansory wants to lure into its showroom. Related video: This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.

Rolls-Royce Phantom Tempus Collection is inspired by the infinite universe

Rolls-Royce, like NASA, is exploring what's far beyond the stratosphere. It introduced a limited-edition version of the Phantom, its flagship, called the Tempus Collection and inspired by time, astronomical phenomena, and the infinite reaches of the universe. Most of the visual changes are found in the cabin, where interior designers added a mesmerizing headliner that represents a pulsar. If your brain is soaking in Shell Rotella, you're thinking of a Nissan sold on and off since 1978; sorry, but it's not that one, though the British firm's Bespoke department can probably make it happen if your wallet is thick enough. In astronomy, according to Rolls-Royce, a pulsar is a type of white-hot star that lurks about 280 light years away from our planet while emitting electromagnetic radiation in extremely regular pulses, hence the name. Stylists transformed the dashboard into a work of art they call the Frozen Flow of Time. It consists of a single billet of aluminum in which 100 individual columns were milled to represent the 100-million-year period of a pulsar's rotational spin. Rolls-Royce also removed the clock from the dashboard to signal that its customers are free from time and its pesky limitations, though we don't think that's a binding promise the company is making to buyers. If you have a few seconds to spare, you can pop open the glovebox and read a quote from Albert Einstein: "The distinction between past, present, and future is only a stubbornly persistent illusion." Visually, the Tempus wears a relatively subtle look characterized by a new color called Kairos Blue. It was created specifically for the limited-edition model to embody the darkness and the mystery of space, Rolls-Royce explained. It features blue mica flakes that shine like stars in the sky when viewed in the right light. Buyers can customize the Spirit of Ecstasy emblem by engraving a date and location — like their wedding anniversary — on its base. Rolls-Royce will deliver each Tempus with a custom-built champagne chest whose table features a hand-painted pulsar. It's big enough to store and chill champagne, caviar, four flutes, and a mother-of-pearl caviar spoon. The outer-space theme does not continue in the engine bay, so don't expect to find a Rolls-Royce Trent turbofan under the hood. Like the regular-production Phantom, the Tempus is powered by a twin-turbocharged, 6.8-liter V12 engine that effortlessly develops 563 horsepower and 664 pound-feet of torque.