2013 Volkswagen Passat 2.5 S 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.

Golf tees up new sales for VW

If you consider the Passat and the CC two different lines, Volkswagen USA lists nine different models on its website, and they have sold a total of 238,074 units in the US this year through the end of August. The Golf, which was voted North American car of the year in 2015, and its variants account for 44,416 sales, an increase of nearly 150 percent compared to the same period last year. That's also the most Golfs ever sold in that time in the US, and almost 19 percent of this year's entire brand sales. This is compared to a compact car segment that has gained just 1.1 percent compared to 2014. A number of factors are responsible, according to a report in Automotive News: the MQB platform allows different powertrains to roll down the same assembly line; VW USA product planners can now configure vehicles to suit our market and they work with a selection of dealers to refine the retail offering; and the Golf maintains its proper European driving experience. The expanse of the Golf range has meant not only increased profits and new buyers, but more breadth in the buying demographic - expanding outward from the standard Golf to five different extremes, from the e-Golf to the Golf R. Room will be made for a new kind of consumer next year when the current Sportwagen model goes all-wheel drive with an Alltrack designation. Unsurprisingly, VW USA says, "Golf is a role model for the US for us. We want to learn from our success and implement those lessons in our future model planning." After decades of uneven effort, perhaps that formula plus a long-awaited range of crossovers can finally deliver on the promise of the US market. Related Video:

Top Gear drag races VW Golf R against McLaren 675LT and Porsche 911

Top Gear's latest quarter-mile drag race in the collects three very different performance vehicles: the 296-horsepower Volkswagen Golf R, 424-hp Porsche 911 Carrera GTS, and 666-hp McLaren 675LT. While each of these cars sit near the top of their segment, they each come from totally different rungs of the sports car price ladder. Spoiler alert, the Golf R doesn't win. But the final results illustrate the diminishing returns of price and performance. For example, the McLaren is only about a second quicker than the Porsche to 60 miles per hour, but the 675LT costs over 2.5 times more that the GTS. Related Video: