2000 Audi A4 Quattro Base Sedan 4-door 1.8l on 2040-cars

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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.

2016 Audi A3 Sportback E-Tron First Drive

While its parent company is still in the throes of an emissions scandal that has thrust the "green" credentials of automakers worldwide under the microscope, Audi is launching its first plug-in hybrid in the US. Audi is ready to double down on its electrified future, putting up its own reputation as collateral. This A3 Sportback E-Tron – a vehicle we've sampled in prototype form – is a tech-savvy plug-in car that could be the perfect vehicle to mark the brand's new commitment to an electric lifestyle. Straightaway, Audi USA President Scott Keogh addressed the TDI situation. He says he and the rest of the company are "shocked, followed by appalled, followed by anger, and now in the phase of drop-dead determination to make this thing right." Out of the 500,000 affected 2.0-liter TDI engines around the world, 14,000 are in Audis: about 3,000 A3 TDI sedans and about 11,000 A3 TDI Sportbacks. "It's quite simple. CARB and the EPA have told us these cars can stay on the road, they will stay on the road until we have a fix, and when we have a fix, we will absolutely fix these cars." The most important thing going forward, Keogh says, is regaining the trust of both the dealers and customers. Audi has been enjoying a bit of momentum in recent years, building a reputation for itself along the way. Audi came on the scene in the US in 1969, but it took until 2010 for the company to sell 100,000 units in a single year. Now, "In 2015, we're starting to look down the barrel of nearly doubling our sales in five years," says Keogh. The A3 achieves a 40-percent segment share, and for 75 percent of those buyers, it is their first purchase of a luxury brand. But as its own pace increases, the momentum of the industry as a whole has pulled Audi toward this foray into electromobility. Enter the A3 Sportback E-Tron. There's a little extra weight from the battery pack, but the suspension does a good job of keeping it unnoticeable while driving. The A3 E-Tron has several strengths working in its favor. First of all, as Keogh puts it, the hatchback is a "real, proper Audi – a real, proper, fully rounded driving machine." Qualifications such as "this is an electric car" don't matter. "People just want to buy a car," he says. It has the technology, build quality, and drivability of an Audi.

2017 Audi S4 goes running naked through the Alps

Audi just launched its new A4 sedan barely more than two months ago, bringing with it a raft of improvements over the outgoing model. And you know what that means: A new S4 performance model is just around the corner. Fortunately, that's just what we have here in these latest spy shots, snapped completely undisguised. Spotted testing in the Alps, the new Audi S4 is closely based on the new A4 we've already seen, benefiting from all its enhancements and weight savings. Only it promises to be more potent. Where previous S4s packed V8 engines and the current (outgoing) model pressed a supercharged V6 into service, this new model is tipped to switch to a fresh turbocharged V6. Expect power to rise from 329 horsepower up to 340 or more, and with less weight to motivate, we can expect performance to improve markedly in the process. Along with a more powerful engine, the S4 clearly stands out visually from ordinary A4s with bigger intakes, upgraded rolling stock, quadruple exhausts, and more. We'll have to wait a little longer to find out all the sordid details, but from the look of it, we won't have to wait long. In fact, we'd be surprised if Ingolstadt didn't take the opportunity to unveil it at the Frankfurt Motor Show this month, so watch this space for more and scope out the photos in the gallery above in the meantime.