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Xcar rates AWD vs. FWD vs. RWD

With snow and ice blanketing large swathes of the United States over the past few weeks, commuting hasn't been easy. Among some drivers, there's an ongoing debate about how much all-wheel drive really helps when it gets slippery and whether rear-drive is as bad in slick conditions as many people think. Xcar Films puts some of those beliefs to the test in its latest video by showing off three very different cars taking on a trio of low-grip challenges. Xcar's picks for the test include the fairly plebeian, all-wheel drive Subaru Impreza, the somewhat plush, rear-drive BMW 120d and the sporty, front-drive Renault Megane RS 275 Trophy. Things start out easy with a hydraulic plate forcing the back end out on a wet skid pad. From there, the tests get really interesting with a slalom on simulated ice, and the cars finish with a high-speed cornering challenge through a soaked turn. While an obvious winner emerges in the end, keep in mind this is hardly a scientific test of grip. For better accuracy, all three vehicles should be wearing identical tires, and the same driver should be behind the wheel of each one. Still, Xcar's examination is a fun chance to see how vehicles react when things get slick. News Source: Xcar Films via YouTube BMW Subaru Renault Driving Safety Videos xcar renault megane xcar films renault megane rs

BMW almost ready to roll out new 2 Series cabriolet

The 2 Series is a relatively new member of the BMW family, having been spun off of the 1 Series (itself one of the company's youngest lines) just last year. So far the range has been split between the Active Tourer and the 2 Series Coupe, but soon the latter will breed a new compact convertible to take the place of the outgoing 1 Series cabriolet, and here we have our best look at it yet.
Spied with the most minimal camouflage and its top down while undergoing its final rounds of development testing, this pre-production 2 Series cabrio looks about ready for show time. While the Active Tourer is based on a different front-drive platform, this convertible is, as you might have guessed, essentially a 2 Series Coupe with a folding fabric roof. That means rear-wheel drive (or potentially all-wheel drive if BMW extends its availability from the coupe to the convertible) win either 228i or M235i specification - both of them turbocharged, the former with a 240-horsepower, 2.0-liter four and the latter with the 320-hp, 3.0-liter inline-six.
Considering that BMW got an approximately $8k premium for the 1 Series convertible over the coupe, expect the 2 Series cabrio to start at a little over $40k for the 228i and top out at around $53k for the M235i xDrive convertible. That is, assuming BMW offers it in that top spec, because at that rate we're getting perilously close to the $54,900 base price of the 435i convertible.

New BMW i3-like Visio.M EV concept uses lightweight resin

It's not a new version of the BMW i3, but an updated version of a lightweight concept car from SABIC, BMW, the Technical University of Munich, Daimler and others does bear a certain resemblance to the well-designed plug-in city car. From the black "glass" in the hatch to the angled line tail lights to the up-and-down window line, you can see a sort of family resemblance (see an i3 comparison photo here). And, of course, they both have an electric powertrain. But the changes made to the new lightweight urban electric concept vehicle is more of an exercise in what's possible rather than a way to evolve the i3 and i8 into a broader i family of vehicles. Even so, what we see here is interesting, since SABIC found all sorts of new ways to take weight out of the car as part of the Visio.M (Visionary Mobility) project, which was first announced in 2012. Let's start with the window material, which as you might guess from the quotation marks above, is not made of glass but is instead SABIC's Lexan polycarbonate (PC) resin plastic. The lower weight (the PC helps shed about 29 pounds) adds two miles of range while the PC resin has better thermal conductivity compared to glass and so does even more because the HVAC system can be more efficient. According to SABIC's computational fluid dynamics analysis, an extra 9-10 miles of range, in fact. Without the battery, this concept weighs just 992 pounds. Remember, BMW already made a lot of weight-reduction measures in the i3 thanks to carbon fiber reinforced plastic, so to make the "glass" lighter would only help boost efficiencies on a production vehicle that uses a resin like this. Read more below. SABIC's LEXAN™ resin delivers weight savings and thermal efficiency for new ultra-lightweight electric car concept developed by BMW-led Visio.M Consortium Munich, October 20, 2014 Today, at the Technical University of Munich (TUM), BMW, Daimler, TUM scientists and a consortium of industry participants showcased a lightweight urban electric concept vehicle with various advances, including an all-plastic design of the car's windows. The windows are made of LEXAN resin, a polycarbonate (PC) material, and coating technologies from SABIC, a leading developer of PC glazing for automotive windows and many other thermoplastic solutions for the automotive industry.