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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).

Recharge Wrap-up: Tesla tour recounted, Smart using Renault electric motors

A man recounts his recent Tesla factory tour in a new video. When Michael Brown toured Tesla's Fremont facility on September 10, he learned a bit about the production process, saw the enormous stamping equipment Toyota left behind, and even caught a glimpse of the finished Model X SUV. Brown was told very few people in the factory had seen the production version of the Model X. Check out the video above, and read more Teslarati. Johnson Controls is expanding production capacity for Absorbent Glass Mat batteries for fuel-saving stop-start systems. With the market for stop-start batteries possibly growing from 22 million to 56 million by 2020, Johnson is investing $555 million from 2011 to 2020 to be able to build more batteries in the US, Germany and, China. The company is planning to build a $200-million battery plant in Shenyang, China capable of producing 6 million batteries per year. "Johnson Controls is currently the world's leading provider of batteries for Start-Stop vehicles and we plan to stay that way," says Johnson's Lisa Bahash. Read more at Green Car Congress. Renault will provide electric motors for the new Smart ED. The electric versions of the Smart Fourtwo and Forfour will use the same motor as Renault's Zoe EV. The batteries for the Smart cars will be manufactured by Daimler's own Deutsche ACCUmotive. The Renault-powered Smart Fortwo and Forfour Electric Drive are slated to go on sale in 2016. Renault and Daimler have had a working alliance responsible for 13 projects since 2010. Read more from Automotive News Europe. Related Gallery Tesla Factory News Source: Teslarati, YouTube: Michael Brown, Green Car Congress, Automotive News Europe Green Plants/Manufacturing smart Tesla Renault Electric Hybrid Videos recharge wrapup

Tesla Model S P85D will improve quickness through over-the-air update

Already able to hit 60 miles per hour in about 3.2 seconds, the 691-horsepower Tesla Model S P85D is absolutely no slouch when it comes to acceleration. Of course, one of the great things about owning a Tesla is the possibility of over-the-air updates coming at any time to make the brand's vehicles even more capable. Elon Musk recently announced the latest software improvement on Twitter (embedded below) for the Model S to make the P85D even quicker. The upgrade sheds a tenth of a second off the dual-motor's already impressive acceleration to 60 thanks to an improvement to the inverter algorithm. The tweak affects the single-motor P85 too, but Musk said the effect would not be as significant. We can't wait for the inevitable updated passenger reaction videos once this enhancement tweak goes live. This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings. Featured Gallery 2015 Tesla Model S P85D: Detroit 2015 View 18 Photos News Source: Twitter [1], [2]Image Credit: Copyright 2015 Drew Phillips / AOL Green Tesla Green Driving Ownership Electric Performance Sedan