19' Cayenne Design Wheels, All Wheel Drive, Bluetooth,navigation on 2040-cars

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New info on how VW, Porsche, Audi V6 TDI engine cheat works

The German newspaper Bild am Sonntag is reporting that US investigators have found three pieces of software that work in concert to turn off the emissions control equipment in certain diesel models after a set period of time. The engine in question, the 3.0-liter TDI turbodiesel, was found in certain Volkswagen Touareg, Audi Q7, and Porsche Cayenne models – the sale of which was suspended in the US late last year. Since most emissions compliance testing takes around 20 minutes, the software in the three VW Group models shuts off the emissions control equipment after 22 minutes, a straightforward end run around the testing. Remember that the 3.0-liter TDI engines aren't included in the big buyback and recall program announced for the smaller 2.0-liter, four-cylinder TDI engines. The 3.0-liter engines will likely get their own program, but we don't know when to expect it or exactly what it will look like. Last month, California rejected a proposed fix for the larger TDI engines, and VW went back to the drawing board. Since the company is unlikely to create two fixes, one for California and one for the rest of the nation, the company can't really proceed until they figure out a solution California will accept. The EPA hasn't officially commented on the report, and we don't know how Bild am Sonntag came across the information, but we'll be closely watching what emerges after this report. Related Video:

2015 Porsche Cayenne S Quick Spin

There are sporty SUVs, but until the Macan came along, the Porsche Cayenne was arguably the only pure definition of a 'sports SUV, a la sports car. The second-generation Cayenne is now five years old, but still looks fresh. It's handsome without obvious effort, especially with the optional 21-inch 911 Turbo wheels. The Cayenne S replaces the old, 400-horsepower, 4.8-liter V8 with the brand-new, Porsche-developed 3.6-liter twin-turbo V6. This engine is quickly proliferating through the range – it powers the current Panamera S and the Macan Turbo. That former 4.8-liter started life as a 4.5-liter with 350 horsepower way back in 2002, specifically developed for the Cayenne, and to the end it remained a potent engine. We tried the new forced-induction V6 with 420 hp earlier this year in the Panamera S, and other than a soggy exhaust note it maintained the character of the former V8 sport sedan, with lusty power and hasty delivery. So, how's it do in the Cayenne? Driving Notes The Cayenne S version of the TT V6 gets 420 hp and 406 pound-feet of torque. That means there's 37 more lb-ft than the previous V8, and 22 more lb-ft than in the new Panamera S. Yet the 607-pound difference in curb weight between the Panamera and Cayenne means the V6 has a heavier load to lift here. And it shows – the instant response is dulled. Stomping the right foot gets the eight-speed transmission rappelling through gears to provide a little kick, but real gumption doesn't come until the turbos kick in. We're maybe talking about a second of pause compared to the Panamera, but a noticeable second. Perhaps a small price to pay for slightly better fuel economy, if you really care about such in your 420-hp SUV. Part of why we notice that second is that the Cayenne S is so right-now everywhere else that any perceived hesitation gets extra attention. It offers a specific adjustability that many sports cars don't have, with one button adjusting the three-mode air suspension and a separate Sport button tweaking the steering, throttle, gear changes, and traction control. With Sport keeping all the horses at the ready and the optional Porsche Torque Vectoring holding things steady, you don't need to step up to the GTS trim to get immediate acceleration, crisp steering, flat cornering at very un-SUV-like speeds, and tremendous stopping power from a total of 20 brake pistons. That said, the exhaust note here could also use a shot of Bruce Banner's gamma rays.

Ruf Turbo Florio is the Turbo Targa Porsche won't sell you

Porsche offers a staggering array of 911 variants. You can get the Carrera, Carrera S, Carrera GTS, Carrera 4, Carrera 4S, Carrera 4 GTS and Turbo and Turbo S (to say nothing of the GT3 and new GT3 RS). And with few exceptions, you can get each as a coupe, cabrio or Targa. Except you can't get a Turbo Targa. The partial-convertible model tops out at the GTS. But if the one thing you really wanted was a Targa with a turbo engine, the folks over at Ruf will be glad to hook you up with the tuned version you see here. It's called the Ruf Turbo Florio, taking the latter part of its handle from the second part of the Sicilian road race where Porsche got the name for its lift-top in the first place. But Ruf's take doesn't just match the factory Turbo's output – it far exceeds it: with 621 horsepower and 608 pound-feet of torque on tap, it'll put even the 911 Turbo S (on Sport Plus overboost, no less) to shame. Plus you can get it with a six-speed manual or seven-speed DCT, driving all four wheels like the factory Turbo or just the rear set like the GT2 that Porsche doesn't even make any more. It'll top out at 205 miles per hour, and all the while with the wind in your hair – but not too much of it. Related Video: