TDI – The Unmuffled Auto News

Reports have surfaced that Audi will buy back 25,000 vehicles that have the 3.0-liter TDI V-6 in the U.S. This buyback would only apply to older models that can’t be brought into exhaust emissions compliance, the German newspaper Der Spiegel reports.

While the initial Volkswagen Group Dieselgate focused on the 2.0-liter TDI four-cylinder, it was discovered that the 3.0-liter TDI V-6 used by the Volkswagen Group also employed this emissions test-cheating software. Audi is currently in talks with U.S. regulators regarding close to 85,000 vehicles equipped with the 3.0-liter TDI V-6, according to a Reuters article. Approximately 25,000 of those vehicles cannot be brought into emissions compliance.

Audi has been facing less-serious-than-Volkswagen litigation in a U.S. District Court regarding the emissions scandal, nicknamed “Dieselgate,” regarding its 2.0-liter TDI four-cylinder and 3.0-liter TDI V-6 engines. In a statement to Automotive News, Audi said:

“We are working hard with U.S. regulators to reach an agreement an approved resolution for affected 3.0-liter V-6 TDI vehicles and thank our customers for their continued patience. The Court has scheduled a status conference for November 3, 2016 to discuss the matter further.”

Way back in April, the Volkswagen Group agreed to buy back some 482,000 vehicles of the approximately 600,000 vehicles with the 2.0-liter TDI four-cylinder engine affected by the emissions scandal. This decision did not include the 90,000 vehicles equipped with VW’s 3.0-liter TDI V-6 engine.

Why the 85,000 and 90,000? Because approximately 85,000 Audis are affected by the recall, and an additional 5,000 VW Touaregs are lumped in there as well.

Here’s my scoop on what it’s going to be like going forward for the VW Group regarding diesels:

I wonder how true the horsepower/torque ratings, fuel economy ratings, etc., are heavily re-evaulated by U.S. regulators and EU regulators – Volkswagen is required to send vehicles to both. In 3-5 years, which is likely when the VW Group will send cars to the EPA and EU, the regulations are going to be much stricter and more heavily enforced than today’s CARB (California Air Resources Board; VW Group has to get all of their vehicles to pass U.S. testing, plus CARB) regulations. VW and Audi will almost certainly try to re-certify their vehicles in the next few years to try and recover their losses.

While the 2.0-liter TDI engine might have gone 40 times over the regulatory maximum, the regulatory maximum in the U.S. is one of the lowest in the world. It’s still low levels of emissions. Yes, it’s disgusting that the VW Group had to do this, but we still don’t know the real reason why. It could have been reliability issues with the engine or cost-cutting measures. Let’s say that the regulatory maximum is 0.0001 parts per million, why don’t we? 40 times over that is still not very much.

West Virginia Tech’s test results found that the Volkswagen vehicles they tested (a Jetta and a Passat) were within carbon monoxide, carbon dioxide, particulate matter, and total hydrocarbon (THC) emissions compliance. In diesel vehicles, carbon monoxide and THC is never really an issue because of it’s nature of combustion. THC is usually found only in cold starts. NOx always has been the primary concern. Any modern diesel vehicle that hasn’t been tuned to “roll coal” have diesel particulate filters, so rolling coal (particulate matter) isn’t much of a concern. This regulation, however, is not separated for diesel-powered and gasoline-powered vehicles, which means that gasoline-powered vehicles will have higher carbon monoxide emissions than diesel-powered vehicles.

European regulators are saying that numerous other diesel vehicles would fail the same tests that the VWs tested went through. The team at West Virginia Tech is currently testing other diesel vehicles, and are combing through massive amounts of data to quantify what the differences are between real-world driving and certification testing. Just because the certification levels may be low does not necessarily mean that the real-world driving will churn out the same results time-after-time. That difference is always going to be there – whether it be with diesel-powered vehicles, electric vehicles, or gasoline-powered vehicles.

They have a great engine note. They have a lot of power. They come in sizes ranging from relatively small to large. Here are some of the best you can buy.

2009 Audi R8 5.2 FSI Quattro: The V8 version of the R8 came out in 2008. It was stunningly beautiful, and offered great performance at a reasonable price. The 5.2 FSI Quattro version added two more cylinders, 105 more horsepower, and even better looks. The 5.2-liter V10 was a slightly-detuned version of the Lamborghini Gallardo’s V10.
2005 BMW M5: The early 2000s were an era when manufacturers could shoehorn massive engines into big sedans without complaint. The 2005 BMW M5 is a relic of that era, and boy is it a good one! It bellowed and roared up to a redline of 8,250 RPM. This 5.0-liter V10 was derived from Formula 1, which is why it sounds so damn magnificent.
2006 Audi S8 5.2 FSI Quattro: This might be one of the ultimate sleepers. This big sedan is a beauty, but it’s a fast one. It got to 60 mph in a scant 4.8 seconds. The magnificent trim inside and out, plus the everyday utility of a large sedan made this quite possibly the best balance between work and play.
2006 Dodge Ram SRT-10: Need I say more than it was a truck that put down 500 horsepower stock? No, I don’t. Oh, and it’s engine came straight out of the Viper.
2003 Lamborghini Gallardo: The first baby Lamborghini was an absolute sweetheart. It was also the car that really saved the brand. It was an Italian beauty with a German heart. The engine started out as a 5.0-liter V10, but ended up as a 5.2-liter V10. It also spanned 10 years. It birthed countless iterations and special editions, while becoming a tuner favorite.
1999 Dodge Viper ACR: It had one of the biggest engines available when it came out, and that engine is still one of the largest around. It sounded more primal than mechanical. It sounds like a dinosaur fighting Slash. Yes, I know, I love to bash Slash.
2011 Lexus LFA: It doesn’t matter that this was a terrible supercar. It sounded like nothing else. Lexus teamed up with Yamaha’s musical instrument division, who tuned the engine note like a guitar. That would explain why it sounds godly. It was described by Lexus engineers as “the roar of an angel.” I think it sounds more like the roar of Satan.
2011 Volkswagen Touareg V10 TDI: It must be a good life to be a diesel V10. Good enough for U.S. emissions regulations to cancel sales on our shores twice. Yeah, twice. Thanks Uncle Sam. That being said, it had twin turbochargers force-feeding air into those 10 hungry cylinders.
2004 Porsche Carrera GT: Where do I start with the “Widow-Maker?” I don’t know. Yes, it has killed people, notably Paul Walker and Roger Rodas, but that was more user error than anything. This car can trace it’s heritage back to Le Mans and Formula 1 cars. That engine note is out of this world. It reminds me of the Bad Company song “I Can’t Get Enough of Your Love.” Except this is I Can’t Get Enough of Your Engine Note.