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Chris Harris pits Aston GT12 vs 911 GT3 RS vs McLaren 650S

The Geneva Motor Show is never lacking in exciting performance machinery. And this year was no exception. Our eyes, like those of Chris Harris, were drawn by two hardcore, track-focused versions of existing sports cars. Both wore the name GT3, and now Harris has brought them together for a supercar shootout. And he's thrown one more in for good measure. Those natural rivals are the Aston Martin Vantage GT12 and Porsche 911 GT3 RS, the latter manufacturer having pressed the former to drop the GT3 name to which it claims exclusive domain. There's a great deal that separates them, of course: one's got a V12 up front, the other a flat-six way in the back. But what binds them together is a common approach of taking an existing model, stripping it down, and tightening everything up to make it more of a weapon than a grand tourer. What that means in the Aston's case is a rather high price tag, much higher than that of the Porsche. But scarce demand and speculation on the open market have left British customers, at least, paying as much for the GT3 RS as for the limited-edition Aston. And that takes both into proper supercar territory. So to show what else that kind of money can get you, Monkey has brought along a McLaren. Not the similarly track-focused 675LT, but the standard 650S... Spider, no less, and with worn hard rubber. So which one performs best on the road? Which clocks the fastest lap time on the track? And which gets Harris' vote? You'll have to watch the video for yourself to find out, but it's well worth the 25 minutes of your lunch break. News Source: Chris Harris on Cars via YouTube Aston Martin McLaren Porsche Videos porsche 911 gt3 chris harris mclaren 650s

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.

Watch MotorWeek review the last great air-cooled Porsche 911

These days air-cooled Porsche prices are blasting through the roof, and the 993 gets much of that love among collectors as the last generation before the 911's switch to water-cooled design. MotorWeek's latest Retro Review now looks back at the 1996 911 Targa. The coupe came from a brief period when the 911s were the only models in the brand's lineup, but the company made sure those cars were perfect. The point of Porsche's Targa models is to combine the open-air driving of a convertible with a security of a coupe. In this case, the engineers came up with a massive glass panel that slid into the roof at the touch of a button. The design still allowed for rearward visibility but created a giant opening to allow the sunshine in. The solution isn't as awe-inspiring to watch as the Transformer-like metamorphosis of the latest 911 Targa, but it gets the job done in a very unobtrusive way. As air-cooled values continue to creep upward, it's fascinating to hear how contemporary reviewers critique the cars. In this case, the 993 lives up to the promise of being the ultimate evolution of the original idea behind the 911. MotorWeek even calls the coupe "simply one of the best road cars ever made." Check out the video to find out why. Related Video: