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Mercedes-AMG GT vs. Porsche 911 [w/poll]

Mercedes-Benz designed the AMG GT to compete head-on with the Porsche 911. It's a clear, singular purpose, and Benz brings a lot of money, technology and race-bred expertise to the fight.
The AMG GT is Merc's followup to the awesome SLS AMG, the retro-modern, gullwing-doored coupe that took us by storm half a decade ago. But this new GT coupe is a more focused sports car than the SLS, rather than an all out supercar capable of extreme performance. It's got a brand-new V8 engine, and state-of-the-art technology that help it to not only be a proper Mercedes, but to be a serious performer.
Mercedes will sell its new baby in two models. The GT S arrives first, in spring 2015, followed by the standard GT in mid-2016. Of course, there's room to grow from there. And while Porsche may have already expanded its 911 range to include a vast variety of models, here's how Stuttgart's icon stacks up against Affalterbach's bad boy.

Porsche announces four flavors of updated Cayenne [w/video]

The new Macan may be getting all the attention lately, but Porsche hasn't forgotten about its larger crossover – the one that put it on the map in 2002 and on the road to profitability, with over half a million sold so far. So to keep the Cayenne at the top of its game, Porsche has announced several key upgrades for the 2015 model. For starters, Porsche has updated the Cayenne's appearance with new front- and rear-end styling. The front bumper, fenders and hood are entirely new, with air fins flanking the nose to direct air into the intercoolers (each model now being artificially aspirated), and new bi-xenon headlamps and daytime running LEDs on every model but the Turbo, which goes all-LED. Around back there's also new taillights, tailgate handle, lower rear fascia and exhaust pipes. Meanwhile the interior has been upgraded with a 918-derived sport steering wheel and reformed rear seats with available ventilation. The bigger news is under the engine bay, where Porsche is offering four choices. The base model is gone as the range starts with the Cayenne Diesel, followed by the Cayenne S, the new Cayenne S E-Hybrid and the top-of-the-line Cayenne Turbo. The Diesel model carries over the same 3.0-liter turbo diesel with 240 horsepower. The Cayenne S however packs a 3.6-liter twin-turbo V6 that's similar to the one found in the Macan Turbo and packs the same 406 lb-ft of torque but more power at 420 hp, 20 more than either its little brother or the model it replaces to reach 62 mph in 5.2 seconds. The new Cayenne S E-Hybrid makes Porsche the world's only car manufacturer to offer three plug-in hybrid models. Porsche has also ported over the powertrain from the Panamera S E-Hybrid to make what Porsche refers to as "the first plug-in hybrid in the premium SUV segment" and, along with the 918 Spyder, make it (almost unbelievably) "the world's only car manufacturer to offer three plug-in hybrid models" (unless, of course, you count the Opel/Vauxhall Ampera as separate from the Chevy Volt and Cadillac ELR). The system mates a 3.0-liter supercharged V6 with 333 hp to an electric motor with 95 hp to give it a combined output of 416 hp (more than the diesel and almost as much as the S) to propel it to 62 in 5.4 seconds, hit an all-electric top speed of 78 mph and an all-out top speed of 151 mph – offering a substantial improvement over the previous Cayenne S Hybrid.

Porsche recalls new 911 models over exhaust pipe issues

Porsche, though the National Highway Traffic Safety Administration, announced a voluntary recall on about 2,200 911 Carrera and Carrera 4 models built during the 2012 and 2013 model years. On cars equipped with the standard exhaust system it was found that the tailpipes could separate from the mufflers and become dangerous road debris; models that added the optional sport exhaust system are not included in this recall.
Affected vehicles were built between March and November of last year, but there have been no reports of the problem on any customer-owned vehicles. Porsche first noticed a cracked tailpipe weld on a test vehicle back in May, and since then has found similar problems on other internally owned vehicles, all with more than 25,000 miles on the clock. To fix the problem, dealers will be replacing the mufflers. Scroll down to read the official notice.