2013 Audi S8 on 2040-cars

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Audi R8 LMS GT4 debuts in New York, a ready-made race car

The new Audi R8 LMS GT4 race car has made its debut at this year's New York Auto Show. Since 2009, the Audi R8 LMS GT3 has been available for customer purchase, but this new model is intended to be even more affordable. LMS GT-class racing is some of the most entertaining out there. Unlike racing series such as Formula 1, NASCAR, or even the World Rally Championship, GTE, GT3, and GT4 cars are still based heavily on cars you can find on dealer lots today. The GT4 class was created to have a true entry-level racing series. Homologation keeps the cars closer to their production counterparts than any of the other GT classes. Engines, bodywork, and suspension are all similar to production versions, though substantially beefed up for racing. In the case of the Audi R8 LMS GT4, more than 60 percent its parts are shared with the R8 coupe. That means parts are plentiful and relatively affordable. There are some significant changes between the production and racing versions. First, the V10 in the road car is actually far more powerful. The R8 LMS GT4 is limited to 495 horsepower, though that can vary slightly to meet different regulations. Also, rather than having Audi's wonderful Quattro all-wheel drive system, the R8 LMS GT4 is rear-wheel drive. Power is sent to the wheels through a seven-speed dual-clutch transmission. Though the car is set to make its debut next month at the Nurburgring 24 Hours, it won't actually be competing until the start of the 2018 season. Audi is simply tuning the car at different tracks before asking for approval at the end of the year. Pricing hasn't been announced, but expect it to fall between the $145,000 of the RS3 LMS and the $450,000 of the R8 LMS GT3. That's not nothing, but in the world of professional racing, it's a relative bargain. Related Video:

2017 Audi S4 First Drive

For all its power and easy performance, the best thing about the last Audi S4 was its uncanny ability to act like a normal (but very high-spec) A4 for most of its life. Then, when you needed or wanted a bit more speed or a bit more grip, you pushed a button or opened the tap and it became something else. It became a thing with more grip, more poise, more focus, and more gristle, but the changeover between the two S4 characters was seamless. That doesn't seem to be the case with the new one. The latest, B9 A4 has been well received and is probably the best mid-sized premium car out there, so that should have left the S4 a simple job to become the best warmed-up premium mid-sizer. It hasn't quite happened like that. The spec sheet suggests the S4 should come out on top in the fight with the BMW 340i and the Mercedes-AMG C43, but the numbers aren't everything. The engine seems impressive on paper; the all-new EA838 3.0-liter turbocharged V6 was jointly developed with Porsche (and it's closely related to Porsche's next V8, with which it will share non-internal bits like the camshaft chain). The 60-degree V6 weighs 31 pounds less than the old S4's supercharged V6, and it's replete with variable valve timing and lift, centrally mounted fuel injectors, and both direct and indirect fuel injection. That gives it 354 horsepower at 5400-6400 rpm (up 6.5 percent) and 369 pound-feet of torque from 1,370 to 4,500 rpm. That gives it a peak 44 lb-ft higher than the old one, spread across a band 600 revs broader. At 2,000 rpm, where drivers live every traffic light, it has another 74 pound-feet. That's enough motivation to move to 62 mph in 4.7 seconds. There's a new all-wheel-drive system that usually shoots 60 percent of the torque to the back but can ramp that up to 85 percent when it needs to, or it can swing it around to fire more than 70 percent to the front axle. The category benchmarks suggest turbocharged 3.0-liter gasoline sixes are the thing to have, with the Mercedes-AMG C43 using one, the 340i BMW having one (though it's straight), and Maserati's Ghibli also using one. The oddball is Jaguar's XE S, which uses a supercharger. You know, like Audi just ditched. The S4 trumps all but the C43 on power (the nine-speed Benz has 362 hp). While it ties the Ghibli for torque, it again trails the Benz (by 15 lb-ft) though its torque peak hits far earlier (the Benz waits until 2,000 rpm).

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: