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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).

Rolls-Royce electric airplane smashes record, hits 387.4 mph

Just two months after its maiden flight, Rolls-Royce's "Spirit of Innovation" has hit a top speed of 387.4 mph, tentatively smashing the speed record for electric airplanes, Gizmodo has reported. It also claimed the top speed of 345.4 MPH over a 3 kilometer (1.86 mile) course and lowest time to a 3,000 meter (9,843 feet) altitude (202 seconds). The records have yet to be certified, but if the 345.5 mph speed stands, it would beat the current record of 213 mph — held by a Siemens-powered Extra 330LE — by an impressive 132 mph.  Rolls-Royce (the aviation, not the car company), conducted the tests on November 16 as part of its ACCEL (accelerating electrification of flight) project. To have the records certified, it's submitting the trials to the Federation Aeronautique Internationale (FAI), the body in charge of world aviation records. If confirmed, the speeds would be pretty impressive considering that the plane only made its maiden flight in September — suggesting that with more time, it could go even faster. 51690212450_7e8bcb3ad8_k View 12 Photos The Spirit of Innovation is an old-school "tail-dragger" airplane (steering at the rear) with the canopy pushed way back, and looks as fast as it goes. It's powered by a 400 kW (535 HP), 750 volt motor. Rolls-Royce said it uses the "most power-dense propulsion battery pack ever assembled in aerospace," with 6,480 cells.  As Engadget detailed in an explainer, electric airplanes aren't practical since current batteries are 50 times less energy dense than jet fuel. However, they do hold some promise for very short trips, like a 30 minute jaunt between Vancouver and Victoria in Canada. And unlike non-turbocharged ICE engines, electric motors retain full power as an airplane climbs, making them ideal for time-to-altitude record attempts — as the Spirit of Innovation has just shown.  Green Rolls-Royce

Upcoming Rolls-Royce Ghost wears evolutionary design in spy photos

The wow factor of a Rolls-Royce does not come from wild, outlandish design. Its cars and SUV are stately, mature, handsome and do not change looks with a shift of the wind like many vehicles in the auto industry. Those who know model cycles know that Rolls-Royce follows a slightly longer timeline than most, and for the current Ghost, its time is nearly up. These spy shots give us an early glimpse of what the updated model will look like. Even with a ton of camo on the car, the photos confirm what we already know about Rolls-Royce: It's a company that does not stray from what its designers deem to be a classic look. The new Phantom looks like the old Phantom, the Wraith looks like the Ghost, and the Cullinan looks like the Phantom. And thus, the new Ghost is pretty much going to look like the current Ghost, just with a few modernizations that will help the model age as well as Pierce Brosnan. What the spy shots show is evolutionary. It retains its traditional three-box sedan design, if slightly smoothed over. It retains the long hood with the blunt snout and vertical bar grille, it has a high belt line that extends the length of the car, the same coach door handles, and even the exact same wheels (though that is typical of a test car). The changes we notice are minor. The car will likely have updated front and rear lighting, the side mirrors appear to have slightly more aerodynamic designs with cameras embedded, and the small third window appears to have a slight change in shape. Following in the footsteps of the Phantom, the new Ghost will likely ride on Rolls-Royce's new Architecture of Luxury platform for an improved ride and drive. We expect the Ghost will take on the Phantom's new 6.75-liter twin-turbocharged V12 powertrain, and it's possible it could also gain four-wheel steering technology. There are rumors about Rolls-Royce producing an EV in the future, but there's no indication which vehicle it would be, or if that's real at all. Check back in the future, as we'll update details on the upcoming Ghost as we see more photos and learn more information. Related Video: