2009 Porsche Cayenne Awd 4dr Gts Tiptronic on 2040-cars

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Watch the incredibly complicated operation of Porsche's new targa roof

Despite Porsche having claimed the name, targa tops are nothing new. In addition to the semi-roofless version of the 911, plenty of cars in the past have used removable roof panels - the new Corvette Stingray has one (as have prior generations), and this type of open-air experience has been available on past vehicles like the Pontiac Solstice Coupe and Honda Civic del Sol.
But when Porsche took the top off its brand new 911 Targa here at the Detroit Auto Show, it was indeed cause for pause. Simply put, this is one of the most complicated and intricate electronic roof panel removal techniques we've ever seen, save perhaps, for the setup found on the Japanese-market Civic del Sol from the 1990s.
We won't spoil the video for you, but basically, rather than just the roof panel coming off, the entire rear glass area lifts away the body in order for the small section over the passenger compartment to slide back. This has to be incredibly expensive to repair once it inevitably breaks. And we highly doubt you'll be able to operate this mechanism at any speed.

Techart modified Porsche 911 Turbo S packs 620 hp, 0-62 in 2.8 seconds

Considering how many absolutely ridiculous tuner cars are featured in Geneva (stay tuned to see plenty, as our coverage continues), it's often refreshing to see some of the more modestly modified cars, like this new Porsche 911 Turbo S from the folks at Techart. Visually, there's a subtle body kit, new wheels, a new spoiler, and some lame decals on the front end, but it basically ends there. That's because Techart's mission is really about higher performance. Increased dynamism, as the Germans say.
An ordinary 911 Turbo S produces 560 horsepower and 516 pound-feet of torque. But the Techart kit adds 60 hp and 96 lb-ft to those already high numbers, for a coupe that dishes out a total of 620 hp and 612 lb-ft. Techart says that, in Sport Plus mode, its modified 911 Turbo S will accelerate to 62 miles per hour in just 2.8 seconds, and the top speed has been increased to 204 miles per hour. Crazy stuff.
To further drive its performance upgrades home, Techart has fitted this 911 Turbo S with a sport exhaust system with valve control, for a more robust exit interview, at the push of a button. We imagine it sounds awesome. Have a look at the Techart Turbo S in the gallery, above.

'Latest production version' of Porsche 918 shown off on Twitter

Porsche posted a picture of what it is calling "the latest production version" of the 2015 Porsche 918 Spyder on Twitter. It looks like the gasoline-hybrid supercar is being driven sportively on some California back roads during Monterey Speed Week.
Whatever updates were made to this version aren't visual (except for the paint), as the one Chris Harris drove last spring and another seen hot-weather testing in Nevada both had production bodies. We presume the changes are relatively minor and more than skin deep - perhaps brake calibration, suspension tuning or tweaks to the powertrain - but Porsche didn't release any more information.
The 918 Spyder is Porsche's latest supercar, which will compete with the LaFerrari and the McLaren P1 hybrid supercars. The Porsche may be the underdog of the group when considering horsepower, acceleration, top speed and price, but the 887-horsepower brute has the most advanced hybrid drivetrain of the three.