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Tesla's 'D' Adds All-Wheel Drive, Safety Features

Tesla Motors CEO Elon Musk unveiled a new version of the luxury electric car maker's Model S sedan that includes all-wheel drive and self-driving "auto pilot" features. The open-to-the-public event Thursday night included free alcohol and test rides on an airport tarmac. With more than 1,000 Tesla fans in the audience, Musk explained that the current Model S is a rear-wheel-drive car with one motor, but a new version will have two motors - one powering the front wheels and one powering the rear wheels. All-wheel drive helps grip slippery roads and is standard on many luxury sedans. Analysts have said Tesla needed it to boost sales in the Northeast and Midwest, as well as Europe. The company sold 13,850 cars in the U.S. this year through September, down 3 percent from a year ago, according to Autodata Corp. Unlike all-wheel-drive systems on gas-powered cars, Tesla's system improves speed, acceleration and mileage by optimizing which motor is used, Musk said. The dual motor version of the P85 performance sedan will have a top speed of 155 mph, compared with the current 130 mph. It will accelerate from 0 to 60 mph in 3.2 seconds, akin to exotic sports cars. "This car is nuts. It's like taking off from a carrier deck," Musk said at the municipal airport near Los Angeles where another of Musk's companies - the commercial rocket firm SpaceX - is based. The crowd obliged with cheers and applause. Tesla is also significantly upgrading its safety features through a combination of radar, image-recognition cameras and sonar. The Model S will right itself if it wanders from its lane and brake automatically if it is about to hit something. Those features are offered on luxury competitors, as well as mainstream brands such as Ford, Hyundai and Toyota. But Tesla is going a step further. Its new system will move the car over a lane when the driver uses the turn signal. It will also use cameras to read speed limit signs and decelerate accordingly. Volvo has a system that reads signs and alerts drivers if they are over the limit but does not change the speed. Musk said "auto pilot" does not mean the car could drive itself - as he put it, a driver cannot "safely fall asleep." Pulling together all the driver-assist features impressed Brian A. Johnson, an analyst with Barclay's. "It's a year ahead of the timeframe I was expecting," he said.

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.

AAA says Tesla Model S is the best green car available

AAA has released its 2014 Green Car Guide (PDF), a 140-page document that discusses what it means to be green, how to be a greener driver, how to shop for green cars, what choices are available and what green cars are on the horizon. Most importantly, the guide evaluates and ranks 83 different green vehicles, from high-mileage gasoline vehicles to battery electric cars, and everything in between. This year's king of green vehicles, according to AAA, is the Tesla Model S. Despite some interpreting this to mean that AAA is calling the Tesla Model S (with 85-kWh battery) the greenest car, the scoring system only includes two "green" categories out of the 13 evaluated: emissions and fuel economy; the Tesla earns 10 out of 10 in both, but so do every other EV on the list. The other categories include braking, crashworthiness, visibility, slalom handling, ride quality, interior noise, acceleration, ease of entry and exit, interior size, turning circle and luggage capacity. The Model S scored very well (more than 7 out of 10 points) in every category except the last four mentioned. So, this isn't about whether the Tesla is the greenest of the lot. Instead, it's about the AAA deeming it the best all-around car of the green bunch. The best green car value is the gasoline-powered Chevrolet Spark 1LT at $229 per point. AAA also calculates the cost per point for the 83 cars tested. The best green car value, according to this evaluation, is the gasoline-powered Chevrolet Spark 1LT at $229 per point. The Tesla Model S is in the bottom five, at $953 per point. So while the Tesla might be AAA's best green car, those points don't come cheap. In terms of the greenest car available, there are other evaluations out there. For instance, the American Council for an Energy-Efficient Economy (ACEEE) released its own list earlier this year, using broader methods for evaluating what makes a car green, including emissions, fuel economy, curb weight and battery weight (the latter two are used to inform environmental impact of production and disposal). Their top three green cars are the Smart Fortwo Electric Drive, Toyota Prius C and Nissan Leaf. The Tesla Model S isn't even in the top 10. Oh, and let's not forget Green Car Journal's Green Car Of The Year, the Honda Accord. Still, which car would you rather drive every day?