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Jay Leno puts carbon fiber wheels to the test on a Porsche 911 GT3 RS

Jay Leno's Garage usually focuses on looking at cars new and old, speaking to their owners and then Jay taking a drive to see what he thinks. However, Leno throws his usual shtick to the curb this week to do a full product test of the carbon fiber wheels from a company called Carbon Revolution. If you're not interested in hearing about wheels for 18 minutes, don't worry. They get mounted on a Porsche and are tested back-to-back with stock wheels, and Leno takes the 911 for a track test, too.
While carbon-fiber wheels aren't exactly a new idea, Carbon Revolution's goal is to create a lightweight, one-piece product that can be mass produced. The company even claims that it already has a deal with an OEM automaker to offer them on a vehicle in a few years. The key to the technology is that it doesn't need an expensive autoclave to be made.
In the meantime, the company's carbon fiber wheels are available as an aftermarket option for about $15,000 a set, according to the video. They weigh in at about 15.5 pounds each and offer OEM-levels of stiffness, so they could cut some unsprung mass off of a performance car. Watch here as Jay and his mechanic Bernard lap Willow Springs and give their feedback about what they think of this cutting-edge technology.

Porsche 991 vs. 930 Flatnose in 911 Turbo convertible faceoff

The Porsche 911 Turbo has a legacy of being a tough car to drive. With a ton of power set right over the rear wheels, its reputation is to lose control as soon as the driver stops concentrating. However, this isn't quite so true anymore. The modern ones are tamed through technology with things like hydraulically controlled engine mounts, not to mention all-wheel drive. In its latest video, Autocar tries to decide whether 25 years of progress really makes the turbo a better vehicle.
It's summer, so what better version to compare than the 911 Turbo Cabriolet? In one corner, Autocar has the latest and greatest 2014 version pumping out 513 horsepower and 486 pound-feet of torque with a seven-speed dual-clutch gearbox. Its challenger is a 1989 911 flatnose convertible sporting 326 hp and 347 lb-ft of torque. It's a truly rare car in the UK with only eight of them remaining on the roads in that region.
Granted, this test isn't so much a battle as it is a comparison. There's no question that the modern 911 would beat the classic in practically every objective category. What the video aims to find out is whether the flatnose is better in subjective measurements like its "feel." Scroll down to watch these two droptop Porsches square off.

2014 Porsche Panamera Diesel is something to torque about

Porsche has been in the business of slaying sacred cows for the better part of a decade, from venturing into the SUV space with the Cayenne to the four-door realm with its Panamera hatchback. And if those vehicles didn't leave brand purists apoplectic enough, Porsche has been adding diesel and hybrid power to its portfolio, thought to this point, neither alt-fuel motivator has made its way into the brand's sports car lineup.
Today's Frankfurt Motor Show effectively marks the second-generation of diesel power in the Panamera, and this updated 3.0-liter V6 features 300 horsepower (50 ponies more than last year) and a whopping 479 pound-feet of torque, available from 2,500 rpm. That power is achieved with a new higher-pressure, water-cooled turbo and redesigned engine internals that include a new crankshaft and pistons. The newfound increase is said to raise top speed to 161 miles per hour from 152, and drop the car's 0-62 mph time from 6.8 seconds down to 6.0. It also figures to be a better handler, with a new torque-vectoring rear differential borrowed from its gas-powered brethren and a reworked transmission for crisper shifts. The suspension has also been retuned, along with the updated 2014 visuals first revealed at April's Shanghai Motor Show.
No word yet on the North American sales prospects of this diesel Panamera, but we imagine that depends in part on how well the Cayenne diesel is selling.