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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).

Used Porsche 911 Rs are selling for nearly $1.3 million

Some cars are just born to be collector's items. Prices of Porsches of all years and styles have started to rise in recent years, particularly air-cooled 911s, but the 911 R seems to take the cake. Used ones are trading hands for almost $1.3 million on the used car market. For a car that sold new for $185,950, that's quite a steep markup. In fact, at seven times the original MSRP, high-end car finance company Magnitude Finance told Motoring Research that it may be an appreciation record. Porsche only built 991 911 Rs. The number is a reference to the current 991 chassis code for this generation of the 911. When it was announced, it was heralded as the purists 911: a lightweight special equipped with a manual transmission and backed by the 4.0 liter flat-six from the GT3 RS. It's hard to say if this is a trend or simply an anomaly. The car hasn't been on sale for long, so few have publicly changed hands. Hopefully the next 911 GT3 will satiate those who desire a driver focused 911 experience at a slightly more reasonable price point. Related Video:

What driving data is Android Auto collecting from us?

In-car solutions like Apple CarPlay and Android Auto make using your smartphone while driving increasingly easy, by replicating most of the gadget's functions on a vehicle's infotainment screen. In fact, they rank among the favorite automotive features available today by Autoblog editors. While there's certainly added convenience, Motor Trend claims Google is collecting a huge array of data during trips, as well. Although, that might not actually be the case. In a rundown of the upgrades for the newly refreshed Porsche 911, Motor Trend asserts that the iconic coupe doesn't have Android Auto because of alleged privacy concerns. Reportedly, Porsche elected to only include CarPlay because the Google tech collected info on a vehicle's speed and other data. The German company didn't want to share all of that vital info with another corporation. Google opposes the allegations, though. "We take privacy very seriously and do not collect the data the Motor Trend article claims such as throttle position, oil temp and coolant temp," the company said in a portion of a statement to TechCrunch. Android Auto does use a vehicle's GPS system for location info, and checks whether it's in Park or Drive to enable some features. Also, users must opt-in to sharing the first time that they connect their phone. There might be an explanation for this confusion, according to TechCrunch. Allegedly before Android Auto launched, Google did want more vehicle data, but the company eventually changed course. Porsche may have based its decision on this earlier version. This case just shines a light on the growing question of automotive privacy and Google's potential role. The government has been unhappy with how automakers have handled this responsibility, so far, though.