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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.

700 horsepower Porsche GT2 RS is the wildest 911 ever

The Porsche 911 comes in a variety of flavors, each filling a certain taste for a certain customer. Sitting atop the range is the new 911 GT2 RS. In previous generations, the GT2 had a bit of a reputation as a widowmaker, a 911 with massive power that could snap and bite with the slightest agitation. Porsche says the new model has been civilized, but with 700 horsepower going to the rear wheels, we're sure it's going to be as mad as ever. Power comes from a highly massaged version of the 3.8-liter flat-six from the 911 Turbo S. The rear-mounted engine makes an outrageous 700 horsepower and 553 lb-ft of torque. Like we previously reported, the new car will use water injection to help keep things cool. The only transmission is Porsche's PDK. While enthusiasts may lament the loss of the manual, the RS models have always been about performance above all else. Simply put, the PDK is the better performance option. All that power translates to a 0-60 mph time of 2.7 seconds and a top speed of 211 mph. The engine makes 80 more horsepower than the previous model. That makes it the most powerful road-going 911 ever built. In fact, the 887 horsepower 918 Spyder is the only road-going Porsche that makes more power. The fact that Porsche trusts all of that power to go to the rear is both thrilling and terrifying at the same time. In order to manage traction, the GT2 RS gets a number of upgrades. Rear-wheel steering has become commonplace in the 911 lineup, so it's no surprise to see it here. Sticky tires with 265/35 ZR 20 section rubber at the front and 325/30 ZR 21 section rubber at the rear keep things planted. That comically large rear wing adds downforce, adding to stability. The car gets standard carbon ceramic brakes. While some people prefer traditional rotors for the street, like the PDK, this is all about performance. A number of intakes and outlets complement the rear wing and maximize aerodynamic efficiency. It's a bit of a surprise that with all the focus on downforce, the GT2 RS still manages to top out at 211 mph. The hood, front wings, wheel housing vents, door mirrors, side air intakes, parts of the rear end, and a number of interior components are all made from carbon fiber. The roof has been made of magnesium. If you want to drop any pretense of civility and comfort in the pursuit of speed, Porsche is offering a Weissach package that shaves off another 40 pounds from the already impressive wet weight of 3,241.

Porsche 960 could come with quad-turbo flat-eight engine

Getting a bead on the target that is the so-called Porsche 960 is not easy, as the target keeps moving. First labeled the 960, then the 961, and now back to being called the 960, it is Porsche's take on a supercar specifically aimed at Ferrari - the latest report in Automobile says that Porsche's internal moniker for it is "FeFi," which stands for "Ferrari Fighter." Because it is expected to cost as much as the top-tier V12 Ferrari, Porsche wants the engine solution to justify the price tag. That means, according to author Georg Kacher, a 3.9-liter, quad-turbo flat-eight engine with 650 horsepower.
Last summer, the engine was mooted to be a twin-turbo flat six. A few months later, the rumor was that it would use the 4.6-liter V8 from the 918 and have about 570 horsepower. This new mid-engine configuration would be quite the leap, giving the 960 more power than the 918 Spyder (pictured) and 911 GT2 RS, and utilize other tech features like four adjustable camshafts and "a complex multistage intake manifold." In this scenario, power would be run through a seven-speed dual-clutch transmission and all-wheel drive.
Build materials are still slated to be a hodgepodge of materials including aluminum, steel, carbon fiber, titanium and magnesium. The boosted flat-eight, all-wheel drive and a 3,000-pound weight could get the 960 from zero to 60 miles per hour in just 2.5 seconds. Since it is looking squarely at Ferrari, the idea that the 960 will be a "four-door coupe" can probably be put to rest. For now.