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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:

'Faster. Farther.' dives into the history of Porsche racing tech

No doubt, Porsche has produced some of the best endurance racecars around, such as the turbocharged, slant-nose 935 of the 1970s and the ground-effects-enhanced 956 and 962 of the 1980s. But the company's most famous racecar, its first overall winner at the 24 Hours of Le Mans, was the 917.
The 917 embodied many of Porsche's technological achievements up to that point, such as the company's first 12- and 16-cylinder engines (the flat-16 was never used in competition), fiberglass bodies that implemented early aerodynamic practices and the use of new, exotic materials, such as magnesium and titanium.
The racecar was commissioned by the head of Porsche Motorsports, Ferdinand Piëch, to win overall at the 24 Hours of Le Mans in 1970, after he realized a loophole in the rules that allowed cars to compete with engines up to five liters in the Sport category if they were also production models. Piëch saw opportunity: the top prototype class was restricted to three liters; the production minimum to compete in Sport was 25 cars. And so, with much effort, Porsche assembled 25 "production" 4.5-liter 917s and had them parked in a neat line for the race inspectors to verify their legitimacy. It didn't take long before people realized the new Porsches were much faster than the prototype racers, with a top speed approaching 250 miles per hour.

Porsche Cayenne shows a bit more face, plug-in spotted

Porsche was first rumored to be working on a plug-in hybrid (PHEV) version of the Cayenne over a year ago. However, we had never seen it, until now. The new model was caught almost completely undisguised while testing. In another stroke of luck, we got a glimpse of the upcoming facelift for Porsche's SUV (pictured above) as well.
According to the spy shooter, it was windy during the cars' cold weather testing. The cover blew off of the facelifted Cayenne, and there was enough time to snap these pictures before it could be hidden again. The changes are all quite minor but jive with what we saw the last time it was spied. The rear still wears some cladding but is expected to be hiding lights similar to the Macan.
The second gallery shows off the upcoming Cayenne PHEV. It looks nearly identical to the standard model, except for the extra panel on the driver's side of the car that hides the electric port. One image even shows the car plugged in. The new version is expected to use the same supercharged 3.0-liter V6 and 9.4-kilowatt-hour lithium-ion battery pack with a combined 416 horsepower and 435 pound-feet of torque from the Panamera S E-Hybrid. We enjoyed the system when we tested it last year. It's rumored to debut on the SUV sometime this year.