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Recharge Wrap-up: Smart Silvretta E-Car Rally, Uber's autonomous Teslas

Daimler took part in the 2015 Silvretta E-Car Rally with seven electrified cars from Mercedes-Benz and Smart. It is the automakers' sixth year competing in the competition in the mountains of Austria's Montafon region. Mercedes fielded two B-Class Electric Drives, an SLS AMG Electric Drive, C350e, S500e and GLE500e 4Matic alongside a Smart Brabus Fortwo Electric Drive Cabriolet. The Silvretta Rally sees some 150 vintage cars and 30 electric vehicles take part in the event, which took place from July 2 through 5 this year. Read more in the press release from Daimler below. Uber CEO Travis Kalanick says that he'd want to buy all of Tesla's autonomous vehicles if they were available in 2020. Venture capitalist Steve Jurvetson relayed Kalanick's comments from the Top 10 Tech Trends dinner in June. Jurvetson also praises self-driving cars, saying, "I believe they are already safer than my parents, and I would trust my kids with them. And they're just going to get better." Jurvetson also believes that taxi services will prosper from the use of autonomous cars in the future. Read more at Hybrid Cars. A Michigan legislator has introduced a bill that would count burning industrial solids — such as tires and plastics — toward the state's renewable energy mandate. Aric Nesbitt's bill would "remove unnecessary burdens on the appropriate use of solid waste as a clean energy source" in order to meet the state's requirement that 10 percent of energy come from renewable sources. Critics argue that these materials are not truly renewable, and that burning them causes pollution and emits greenhouse gases. The proposed bill would also repeal a law requiring utilities to work toward reducing energy use by one percent per year. Read more at Treehugger. Will the cars National Electric Vehicle Sweden (NEVS) builds in China bear the Saab name? While NEVS is the newest parent company to Saab after being acquired in bankruptcy from Spyker, there's no confirmation that the electric vehicles it builds at its Tianjin plant will be sold as Saabs. Swedish defense firm Saab AB, which held the rights to the Saab name, withheld permission to use it after NEVS declared bankruptcy last year. "The exact models and brands are not finalized yet," says a NEVS spokesman. The company says it is spending $200 million to build the new factory in China, with an expected annual capacity of 200,000 vehicles. Read more at Automotive News Europe.

Mercedes-Benz engines with 48-volt systems coming in 2017

As part of a big green push announced yesterday, Mercedes-Benz is jumping into the world of 48-volt power. The company will launch a new family of efficient gasoline engines next year and will begin rolling out 48-volt systems with it, likely in its more expensive cars first. Mercedes will use the 48-volt systems to power mild-hybrid functions like energy recuperation (commonly called brake regeneration), engine stop-start, electric boost, and even moving a car from a stop on electric power alone. These features will be enabled through either an integrated starter-generator (Mercedes abbreviates it ISG) or a belt-driven generator (RSG). (RSG is from the German word for belt-driven generator, Riemenstartergeneratoren. That's your language lesson for the day.) Mercedes didn't offer many other details on the new family of engines. There are 48-volt systems already in production; Audi's three-compressor SQ7 engine uses an electric supercharger run by a 48-volt system, and there's a new SQ5 diesel on the horizon that will use a similar setup with the medium-voltage system. Electric superchargers require a lot of juice, which can be fed by either a supercapacitor or batteries in a 48-volt system. Why 48-volt Matters: Current hybrid and battery-electric vehicles make use of very high voltages in their batteries, motors, and the wiring that connects them, usually around 200 to 600 volts. The high voltage gives them enough power to move a big vehicle, but it also creates safety issues. The way to mitigate those safety issues is with added equipment, and that increases both cost and weight. You can see where this is going. By switching to a 48-volt system, the high-voltage issues go away and the electrical architecture benefits from four times the voltage of a normal vehicle system and uses the same current, providing four times the power. The electrical architecture will cost more than a 12-volt system but less than the complex and more dangerous systems in current electrified vehicles. The added cost makes sense now because automakers are running out of ways to wisely spend money for efficiency gains. Cars can retain a cheaper 12-volt battery for lower-power accessories and run the high-draw systems on the 48-volt circuit. The industry is moving toward 48-volt power, with the SAE working on a standard for the systems and Delphi claiming a 10-percent increase in fuel economy for cars that make the switch.

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).