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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

Porsche 911 GT3 RS getting all-new atmospheric engine

Porsche surprised many of its most puritanical enthusiasts when it took a decidedly more usable approach with the current 911 GT3. But when the new GT3 RS debuts, it promises to be a much more extreme departure. And a big part of that comes down to the engine. At the Detroit Auto Show this week, Auto Express spoke with Porsche R&D chief Wolfgang Hatz – who also happens to be head of engine and transmission development for the entire Volkswagen group. Hatz revealed that Porsche has developed a completely new engine for the GT3 RS, and while previous rumors suggested the RS would go turbo to fill in for the lack of a GT2 (and make the most out of its displacement), Hatz confirmed that it will be naturally aspirated. Considering that Porsche rarely goes downwards when it comes to 911 engine displacement, only upwards, we'd expect the new RS to pick up where the previous 4.0 left off. The new GT3 RS is also expected to pack a more extreme suspension, aero and stripped-out interior, but those hoping for an old-school approach may be disappointed to learn that the new RS will (at least at launch) only be available with the seven-speed dual-clutch transmission – though a manual version could follow if there's enough demand. In a related development, Hatz also hinted that the Cayman GT4 could debut at the Geneva Motor Show in March, with an even more extreme approach than the previous Cayman R. The new top-of-the-line Cayman is reportedly being developed to comply with GT4 class racing regulations but be fully homologated for road use. Related Video:

Porsche 911 GT3 RS looks wicked, this way comes

Those who didn't think Porsche went extreme enough with the latest 911 GT3 likely won't be disappointed when the more focused GT3 RS arrives. And as you can see from these latest spy shots, it looks like it's speeding right around the corner. Tipped to debut at the Geneva Motor Show this coming March, the new Porsche 911 GT3 RS is shaping up to be an enthusiast's dream - and with the prospect of a GT2 in doubt, could be the most hardcore Elfen in the range. Instead of the 3.8-liter flat-six in the current GT3, the new RS will pick up where the previous limited-edition GT3 RS 4.0 left off, with four naturally aspirated liters of unadulterated boxer power channeling a good 520 horses to the rear wheels. That will be a significant increase over the existing 475-hp GT3 and will match the 911 Turbo for output (if not the 560-hp Turbo S) and without any turbo lag to slow down the action, either. Whether it will keep the GT3's dual-clutch gearbox and four-wheel steering system, or ditch one or both for a more analog approach, remains to be seen, but we're holding out hope. Either way, the modifications to the bodywork ought to make the GT3 RS stand out even further and stay glued to the race track it will call home. Notice the deep front splitter scooping up snowflakes like a shovel, a massive rear wing (which may or may not be the final production version), the Turbo-spec rear end with air intakes ahead of the rear wheels, and a set of awesome-looking gills over the front wheels – all of which you can scope out in the gallery full of spy shots above.