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To solve diesel problem, VW might need two fixes

Volkswagen says that a fix is on the way for its 11 million vehicles around the globe that are equipped with diesel engine software that can evade emissions tests. The problem might be far more complicated than simply creating a single solution for all of them, though. According to Automotive News citing Reuters, two remedies to cover different NOx-reducing systems could be necessary, and both potentially affect performance. Earlier examples of the EA 189 diesel engine used a lean NOx trap to reduce the harmful material coming from the tailpipe. According to experts in the Automotive News report, a software update might allow the engines to achieve compliance, but that could affect fuel economy. VW already tried this route once before the scandal came to light, but tests by the California Air Resources Board still showed the figures were too high. Later, some of the 2.0 TDI engines began using Selective Catalytic Reduction that reduced NOx by injecting a urea solution into the exhaust stream. According to Automotive News, a software update for this equipment might increase the amount of the substance used. Not only would that mean topping up the fluid more often, but there still could be some reduction in fuel economy. But, since the 2-liter, 4-cylinder TDI engine that sits inside the diesel vehicles first mentioned as being affected by the issue in the US don't have a urea treatment system, VW would need to install them into these cars. VW still hasn't officially outlined its solution (or solutions) to the emissions issue but is expected to soon. The automaker's long-term evasion of regulations with these diesel engines pumped vast quantities of additional NOx into the air. The substance is known to be linked with smog and acid rain. The US Department of Justice is already beginning an investigation into the company, and politicians are pushing for harsh punishments.

2017 Audi R8 First Drive

You might think the new Audi R8 is a Lamborghini in a business suit. You'd be wrong; the Huracan is an R8 in a Heinlein shock trooper suit. This is the most raucous, rowdy Audi yet, and it's most certainly a supercar – even when parked next to its bawdier Italian cousin. Although the Huracan has been on the street for nearly a year now, the new R8 and the Lambo were developed in parallel. Audi handled most of the engineering workload, with the Huracan receiving Lamborghini's styling and tuning finesse on top of its Audi-built V10 engine and seven-speed dual-clutch transmission. The R8 gets Audi's motorsports-inspired best. Tally it all up and you have two very different cars built from very similar components. Of course, that could also be said of the R8 and its racing doppelganger, the R8 LMS, the racecar built for WEC endurance racing. That car, in fact, is more closely related to the R8 than is the road-going Huracan – the wheelbases are the same, 50 percent of the parts are shared, and the bodies-in-white are built on the same line. The racecars are pulled off line for occasional tweaks or additions, then slotted back in to run through most of the same workflow as the R8s that will eventually end up on the streets. Like a new pair of your favorite shoes, the new R8 is familiar and foreign at the same time. This development program pulls from the best of a legendary supercar brand's flair for presence and idiosyncrasy. It also takes lessons from the company's customer racing effort, as well as Audi's own impeccable taste in road manners and clean, elegant design. The end result is an inspired supercar with daily-driver comfort and a surprisingly aggressive side. Like a new pair of your favorite shoes, the new R8 is familiar and foreign at the same time. It's more comfortable and compliant on the street, thanks to a new chassis that's 40 percent stiffer, allowing for a more forgiving suspension tune. The completely reworked 5.2-liter V10 engine has a Great White bite to go with its Rottweiler bark, but only after you provoke it from polite mode with a press of either the Drive Select button or the exhaust sound switch. The seats are comfortable – that can be said for both the standard sport seats or optional carbon-shell, race-style buckets. Wrapped in a cabin that's much more futuristic and forward-looking than the last R8, the overall driving experience is refined, luxurious, and high-tech.

2013 Audi RS5 Cabriolet

The Audi RS5 is a bit of an odd duck in the brand's US lineup. At the moment it is one of only two RS models - the other being the TT RS - atop a pyramid of A and higher-performing S models. It is not, however, the brand's flagship performance model - not even close - that space being occupied by variants of the R8 supercar, specifically the V10 and GT models, and upcoming 560-horsepower RS7.
The RS5 does, however, owe its beating heart to those ten-cylinder R8s, its own 4.2-liter V8 almost identical to those engines save for two fewer cylinders. Outside of the R8, then, the RS5 is the lone bastion of naturally aspirated V8 power in a brand that once happily shoved 4.2-liter V8s under any hood that they would fit. Today, not even the giant Q7 SUV offers a V8. Lastly, the RS5 is not new, except to us, having been on sale in Europe in coupe form the last couple of years.
While Europeans were able to enjoy the hardtop two-door without us, the RS5 Cabriolet is reaching both peoples around the same time: now. We reviewed the RS5 coupe just recently, and having spent some time with the tin-top model myself as well, here is my take on the droptop version of what I consider one of Audi's most interesting models.