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Why it's difficult to accurately test the efficiency of a plug-in car

When it comes to electric vehicles and plug-ins in general, the Environmental Protection Agency-certified range is a hugely important number. While actual range anxiety is largely psychological, the magic number does provide a point of comparison of buyers considering one EV over another. The driving distance is also often touted by automakers when marketing their models. Unfortunately, as Green Car Reports finds in a recent deep dive, the way the EPA calculates the figure is a convoluted mess, and discovering the reasons why is definitely worth the read. The issue isn't about bad science but instead comes down to vague wording. The EPA's accepted range test is sourced from an evaluation called J-1634 from the Society of Automotive Engineers, and it seems to provide balanced results for vehicles that automatically reach a single state of charge when plugged in. However for models with multiple charge settings, the situation gets complicated very quickly. Of course, these modes are often created in the software, meaning that a car's certified driving distance can change with just a few taps of the keyboard without the real world results owners might experience actually changing. By showing the test's effects on the certified range for the Tesla Model S, Nissan Leaf and Mercedes-Benz B-Class Electric Drive over the last few years, Green Car Reports makes a compelling argument that it's the evaluation that needs to change. Thankfully, it appears that the solution is a very simple one. Get the details here.

Xcar drives the Mercedes-AMG C63 S

The transition among Europe's high performance vehicles from naturally aspirated power towards turbocharging has taken time but has shown constant progress. The march seemingly started with hot hatches when models like the Volkswagen GTI quit adding displacement and finally succumbed to forced induction. Now, the change has affected the higher rungs with the latest BMW M3 and possibly even all future Porsche 911s. Of course, the question arises does this shift really matter to the driving experience? Xcar Films aims to find while taking a spirited ride in the new Mercedes-AMG C63 S. One thing is for sure; the switch from the 6.2-liter V8 in favor of the new 4.0-liter twin-turbo doesn't seem to be hurting the Merc's sound. Even with forced induction, the exhaust still emits a very angry grumble. Find out from Xcar if the rest of the new engine's attributes stack up quite so well, though. Related Video:

Sunday Drive: A new Rambo Lambo takes center stage

Surprise! Autoblog readers love fast cars. Doesn't matter what shape; doesn't matter what size. As long as it's got big power, wicked acceleration, and ludicrous speed, you're interested. Take, for instance, the brand-new Lamborghini Urus. It's got a 4.0-liter twin-turbocharged V8 sending 641 horsepower and 627 pound-feet of torque through an 8-speed automatic transmission to all four wheels. It hits 62 miles per hour in 3.6 seconds, and has a top speed of 189.5 mph. Ludicrous speed? Check. And although you'd be hard pressed to draw a line straight back from the upcoming Urus to the old, off-road-ready LM002, at least you can say that Lamborghini does have a history of producing overpowered SUVs. A 5.2-liter V12 engine producing 444 horsepower and borrowed from the Countach certainly qualifies as big power, especially considering this was in the 1980s and '90s. A prime example just sold for nearly half a million bucks. Moving along to more traditional sportscars, we got a sneak peek at the next Porsche 911's interior, thanks to some intrepid spy photographers. And we spy with our little eyes some major changes to the quintessential German sportscar. Finally, we round out this Sunday Drive with two First Drive reports. Both are German, but past that, they couldn't be more different. Either way, ludicrous speed is all but guaranteed by either one. As always, stay tuned to Autoblog for all the latest automotive news that's fit to print. The 2019 Lamborghini Urus, fastest SUV in the world, has landed Rare U.S.-spec 1990 Lamborghini LM002 fetches $467,000 at auction Next Porsche 911 will get a major interior overhaul 2018 Mercedes-Benz S-Class Coupe/Cabriolet Review | Creamy goodness 2018 BMW M5 First Drive Review | Power meets traction