1991 Porsche 911 Carrera Cabriolet on 2040-cars

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The 2013 Rolex 24-hour race at Daytona comes down to the last hour [spoilers, w/video]

It took 24 hours to run the race, but it was the last one was stuffed with the high action as four cars were still trying to figure out how to gain victory on the track and in the pits. Along with the obligatory crashes, spins, mechanical issues and retirements had come numerous penalties, a double-digit number of full-course yellows and two hours of fog that turned early Sunday morning into a stretch of parade laps.
The final hour would make up for the morning - drivers who might have been happy just to get on the podium had a shot at victory as the end of the race approached, and that turned into a few gambles that paid off, and at least one that didn't...

Are you the next Porsche 911 GT3 RS or GT2?

Porsche typically keeps to a suitably fast schedule when it comes to rolling out increasingly hard-core performance versions of the 911. After the 997 Carrera debuted in 2004, the GT3 version followed in 2006, and by the end of the 2007, Porsche had rolled out both the GT3 RS and GT2 versions. Then the facelifted 997.5 came out in 2008 and it was back to the start: the GT3 came in 2009, the GT3 RS and GT2 RS in 2010, and the GT3 RS 4.0 in 2011. But things have slowed down some with the latest 991 generation.
The new Carrera came in 2011 and the GT3 followed in 2012. By recent history's example, we should have at least two more hardcore models by now, but we don't. Maybe the engineers in Zuffenhausen have had their hands full fixing the spontaneous-combustion issues with the existing GT3, or maybe their attentions have been focused elsewhere altogether. But if these spy shots are anything to go by, it seems like they're back on the job.
Now we don't know if this prototype foreshadows a new GT3 RS or a GT2, but it sure looks more hard-core than the existing GT3 that many purists have derided as too soft, what with its automatic transmission and four-wheel steering.

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.