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Here’s how 20 popular EVs fared in cold-weather testing in Norway

Electric vehicles are known to suffer diminished performance in cold weather, but some do a better job than others hanging onto their range capacity while cabin heaters and frigid outdoor temperatures sap power from their batteries. Recently, the Norwegian Automobile Federation put the 20 of the best-selling battery-electric vehicles in the country to the test, to see not only how winter weather affected their range but also their charging times. The major findings: On average, electric vehicles lost 18.5% of their official driving range as determined by the European WLTP cycle. Electric vehicles also charge more slowly in cold temperatures. And interestingly, the researchers learned that EVs don’t simply shut down when they lose power but instead deliver a series of warnings to the driver, with driving comfort and speed levels maintained until the very last few miles. Because itÂ’s Norway, the worldÂ’s top market for electric and plug-in hybrid vehicles by market share, the test included many EVs that arenÂ’t available here in the U.S. But there are many familiar faces, among them the Nissan Leaf, Tesla Models S, 3 and X, Hyundai Kona (known here as the Kona Electric) and Ioniq, and Audi E-Tron. In terms of range, the top-performing EV was the Hyundai Kona, which lost only 9% of its official range, which the WTLP rated at 449 kilometers, or 279 miles, compared to its EPA-rated range of 258 miles on a full charge. It delivered 405 km, just enough to nudge it ahead of the Tesla Model 3, which returned 404 km. Other top performers included the Audi E-Tron, in both its 50 Quattro (13% lower range) and higher-powered 55 Quattro (14% lower) guises; the Hyundai Ioniq (10% lower); and Volkswagen e-Golf (11% lower). At 610 km (379 miles) the Tesla Model S has the longest WLTP range of all models tested and went the furthest, but still lost 23% of its range, though it also encountered energy-sapping heavy snow at the end of its test, when many cars had dropped out. The Model 3 lost 28% of its range. The worst performer? That goes to the Opel Ampera-e, better known stateside as the Chevrolet Bolt. It traveled 297 km (about 184 miles) in the test, which was nearly 30% lower than its stated WLTP range. We should also note that Opel, now owned by Groupe PSA, is phasing the car out in Europe and that Chevy recently upgraded the Bolt here in the U.S.

2015 Chevrolet Corvette Z06

"Corvette" has stood for American muscle, American sports car, and American supercar. In many cases, it still stands for America: liberty on the go, LS-powered freedom. There was also a time when it meant really impressive numbers that didn't equate to really impressive handling, and a not-so-nice cabin. The handling issue really turned the road-legal corner when the C5 Z06 was introduced in 2001, and by the time the super-duper ZR1 ended its run in 2010, Corvette had exorcised practically all of its dynamic demons. But when I took a seat in the 2015 Corvette Z06 on the first day of my week-long loan, I espied a few demons still squatting in the interior. When colleague Seyth Miersma drove the Z06, he wrote, "Listen, I'm not going to be the guy that dogs the Corvette for having a cheap-feeling interior, this generation has put those once-legitimate claims to rest." Well, I am going to be that guy, because I don't think those claims have been put to rest. One day Chevy will give us leather that looks and feels like leather, instead of the astonishingly thin hide that is laid directly on top of the instrument panel structure. This material was set off by white stitching, but there were no seams, just a trail of white stitches. In some places it was hard to tell where the leather ended and the plastic began; or it might all have been the same upholstery, I don't know. Five dollars of foam padding would add five thousand dollars of luxury to the cockpit. One day Corvette will have plastics that don't look so plasticky. I know General Motors can do it. And after years of thinking Corvette seats were too wide and flat, this latest Z06 is almost there. The seatbacks were nice, but the exaggerated side bolstering on the seat bottoms was too narrow and sharp. That's a personal preference, though; other drivers with thinner thighs will think differently. My complaint isn't that the interior isn't luxurious, it's that it's not luxurious enough. If Chevrolet was worried about pricing, it could add some kind of profligate package to the options list. Have some ex-Porsche people design it, call it the Teutonic Splendor Package, slap a massive price on it, and count the money. People will buy it, and no one will ever have to say again, "But the interior..." That said, this test car's cabin had every feature I wanted. The gauge cluster was bright, crisp, and readable in every shade of daylight.

How long will the 'golden age' of performance last?

High-powered sports and luxury cars were everywhere at the New York Auto Show, prompting the obvious question for enthusiasts: How long will this golden age of performance last? Industry leaders have some time before regulations elevate the Corporate Average Fuel Economy level in 2025. Even then, they expect cars rippling with power to survive in some form. "Is it the end of an era," I don't think so," said Ola Kallenius, Daimler AG board member for Mercedes-Benz cars marketing and sales. "That performance element of individual mobility I don't think will ever go away." Kallenius, who oversaw the company's AMG division from 2010-2013, expects it to continue to grow. Last year, AMG sold a record 68,875 units around the world, an increase of 44.6 percent over 2014, with strong growth in the US, China, and Germany. Still, there's always the potential for gas to spike, and pending fuel economy regulations are looming. That could lead AMG to add electrification to its products, Kallenius said, pointing to the electric SLS as a test case. Chevy is also thinking ahead, said Al Oppenheiser, chief engineer of the Camaro. He wouldn't bite when asked about electrification for the Camaro (he did say "never say never"), but admitted in 2025 "it's going to be pretty tough to sell V8s." For now, things are rosy for muscle cars, and Chevy confidently showcased the 640-hp Camaro ZL1 in coupe and convertible form in New York. "I think that this is truly the golden age of performance," Oppenheiser said. It's hard to disagree. News & Analysis News: The 2017 Mazda MX-5 Miata RF was a show-stopper in New York. Analysis: There was a palpable energy when this RF — for Retractable Fastback — was revealed the night before the show at a trendy off-site venue near the Hudson River. Even as a parade of SUVs and flashy luxury cars rolled out the rest of the week, the Miata remained a hot topic. The Retractable Fastback is really a clever targa top, with part of the roof stowing behind the seats, adding about 100 pounds compared to the standard convertible. It makes the car more practical and arguably more attractive. The RF continues Mazda's tradition of selling the Miata with a hardtop variant. The first and second generations offered a detachable one, and a power retractable hardtop (a $1,700 option) was available on third-gen models. Judging by its reception in New York, the RF could prove to be even more popular than its predecessors.