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2015 Audi A3 TDI Challenge

I officially gave up after 758 miles. The 15 or so miles leading up to this decision were spent in the right lane of Southern California's I-8 freeway, hazard lights blinking, climbing uphill at just over 40 miles per hour. After two days of sweating to the oldies (okay, a mix of SiriusXM Classic Rewind and First Wave), I had covered those 758 miles in a 2015 Audi A3 TDI on one tank of diesel fuel. And when I say sweating, I mean it quite literally. In order to maximize fuel efficiency, my co-driver and I kept the air conditioning off, even when the direct sunlight in the California desert had outside temperatures hovering around 90 degrees. I had been doing this hypermiling exercise for two days, the car was getting stinky, and I was ready to hear the sweet "thhhhhhhwack" of satisfaction that would finally come from peeling my sweat-soaked self off the A3's leather seat. Sexy, I know.
Audi had challenged me to drive 834 miles from Albuquerque, NM to San Diego, CA, on just one 13.2-gallon tank of diesel fuel. If you believe the EPA's highway fuel economy rating of 43 miles per gallon, this means I should have sputtered to a stop after 568 miles. But I went a grand total of 758 - that's 59.4 mpg - and I could have kept going. In fact, two teams made it the full 834 miles on their one allotted tank of fuel. That's over 63 mpg. That's twenty miles per gallon better than EPA estimates.
The TDI Challenge took me through three states over the course of two days, and the 834-mile journey wasn't just a simple highway cruise. I negotiated uphill climbs, long series of involving switchbacks through the mountains and elevations that ranged from 220 feet below sea level to nearly 8,000 feet above. I learned that super-crazy-efficient driving like this an incredibly challenging game that takes serious skill. But I also learned that if you're going to attempt to stomp all over the EPA's numbers, the Audi A3 TDI is one heck of a car for the journey.

Researchers halfway to cutting carbon fiber costs by 90%

Carbon fiber has been utilized for decades to build racecars, as a means to cut weight while maintaining strength. But until recently, the space-age material has been largely absent from the street on anything but supercars because of the expense to use it. Recently, BMW signaled a major shift in that trend when it starting using carbon fiber reinforced plastic panels on the i3 and i8. This relatively small scale start might be just the beginning; the German company believes that a breakthrough to inexpensively manufacture the lightweight stuff is just on the horizon.
MAI Carbon Cluster Management GmbH counts BMW, Audi, Airbus, the German government and many other organizations as supporters, and it's researching how to make carbon fiber cheaper to produce, according to Automotive News Europe. The company thinks it can reduce costs by 90 percent in the near future. "We've certainly reached a halfway point on our cost-cutting target for suitable carbon-fiber parts," said project head Klaus Drechsler to Automotive News Europe.
Unfortunately, it isn't entirely clear just what MAI Carbon is doing to make such a huge leap possible. However, a recent post on the company's website talks about a new form a carbon fiber using a thermoplastic matrix that could be cured in less than three minutes. That's compared to about 90 minutes in the traditional process with an autoclave.

Audi TT Sportback Concept rounds out an icon

That German automakers seem singularly fixated on filling any white space between their models isn't new - the last decade-plus has seen their showrooms overflowing with niche models, some of which seemingly occupy sub-genres of sub-genres. To our eyes, there's often diminishing aesthetic and utilitarian returns to go along with the heightened price tags that accompany these models, but we're beginning to think Audi is tackling its personal diversity initiative best. Unlike the often heavy-handed designs from rivals (we're looking at you, BMW), Ingolstadt seems to be doing doing a more graceful job of carving out models between models. The latest proof of this is the TT Sportback Concept, just unveiled here at the Paris Motor Show.
After showing off its Allroad Shooting Brake Concept in Detroit and, more recently, in the Offroad Concept in Beijing amidst rumors of the TT sports car platform expanding into an entire family, we're not surprised to see this more utilitarian five-door hatchback showcar here in France. This, despite the fact that Audi already counts similarly proportioned A5 Sportback and A7 Sportback models in its lineup.
Of the TT line extension concepts, this Sportback certainly looks the most production ready, with a bare minimum of showcar tinsel masking realistic proportions and detailing. We think it's quite handsome from stem to stern, even if it's a bit familiar looking. The design incorporates Audi's trademark big-grille look with the TT's prominent arched roofline and heavily radiused fenders, along with a rear lighting graphic that subtly echoes the A3. Despite its leggy looks, the TT Sportback Concept is surprisingly compact, spanning less than a foot longer overall than the production 2016 TT despite its 4.7-inch longer wheelbase and extra set of doors. Those sleek looks come at least partially as the result of an overall height that sits 1.2 inches lower than the TT coupe.