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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.

This BMW i8 gains Alpina V8 power thanks to tuner

German engineering firm Gabura Racing Technologies will strip out everything that makes a BMW i8 green in an effort to create a much wilder machine. Rather than a plug-in hybrid with a turbocharged three-cylinder, the company will cram in a twin-turbo V8. The firm even intends to produce a limited run of these insane conversions for customers. Gabura hasn't actually built one of these beasts yet, but it provided several glimpses of how it would work at the 2015 Professional MotorSport World Expo in Cologne, Germany. The company stuffs the engine under the front end in what looks like a quite snug fit. In several of the photos, the top of the valve covers even appears to be above the base of the windshield. According to BBC Autos, this mill is the S63 4.4-liter turbocharged V8 from the M5 and M6. Additional tuning with some help from Alpina allegedly pushes output to around 760 horsepower – more than double the i8's stock figure. One of Gabura's own six-speed sequential gearboxes reportedly transfers the power to the wheels. Gabura recently posted on Facebook that the engineers are now ready for the first conversion. They promised to "completely rebuild it inside-out, fueled with racing technology." We're very curious to see how an i8 looks and sounds after such a significant transformation.

Coming Toyota Supra to forgo hybrid, get a BMW six-cylinder turbo?

For years, almost all of the talk about the Toyota FT-1 concept becoming a resurrected Supra envisioned a hybrid under the hood. And then the latest take on Future Toyota 1 showed up at the 2014 Detroit Auto Show and - although Toyota wouldn't say a word about any engine at all - horizons began to expand. Imaginary fancies were aided by the news that Toyota had partnered with BMW to develop a sports car on the next-generation BMW Z4 platform, which would necessarily mean an engine bay designed to accept an old-fashioned hunk of gas-burning iron-working solo. Car and Driver now turns the whole thing around, reporting that there will be an inline-six with forced induction provided by BMW under the hood. What about that hybrid, though? The report states, "there's currently no indication that the Silk Road cars will offer hybrid options" - 'Silk Road' being the codename for the jointly-developed vehicles. CD makes a point to note that said tidbit came from Germany, not Japan. However, designers at Toyota's Calty studio did tell Automotive News last year that they designed the body with an inline-six in mind, a nod to the Supra's history. Hybrid rumors aren't dead yet, though - remember, we were hearing about all-wheel drive and supercapacitors in May 2014. The coupe is predicted to be a 2018 model, making its appearance sometime in 2017, and be "about 10 percent" smaller than the FT-1 concept. Related Video: