1975 Porsche 914 on 2040-cars

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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.

MotorWeek proves '90s were awesome with Supra, Stealth, RX-7, Corvette, 968, 300ZX comparo

Oh, the heady days of 1993, back when the Clinton Presidency was just getting underway, and it seemed like every hot new rock band was coming out of Seattle. Sports cars in the US had finally shaken off the shackles that slowed them during the '70s and '80s, and you could buy any number of legitimately quick vehicles again. MotorWeek recently went digging into its archives to find this six-model test from 1993 showing off some of the best semi-affordable performance coupes that money could buy at the time, and it's priceless.
Featuring the 1994 model year Toyota Supra in twin-turbo guise and MY 1993 versions of the Porsche 968, Nissan 300ZX TT, Mazda RX-7, Dodge Stealth R/T Turbo and Chevrolet Corvette LT-1, MotorWeek definitely covered all of the bases. One thing that might surprise younger readers is these cars' performance. The video only provides 0-60 acceleration times, but several of these vehicles would still be considered pretty potent today - over 20 years since going on sale. The Supra is especially impressive, hitting 60 miles per hour in just 5 seconds. Even today, that's nothing to sneeze at.
Given their performance potential and still-attractive looks, it's amazing that some of these coupes are old enough to drink now. The progress of interior design and safety equipment in the intervening years is pretty shocking, though. In most of these models, having two airbags is touted as a big deal. Scroll down to watch a Throwback Thursday blast from the past about some of the '90s best sports cars.

Porsche Panamera gets new diesel in time for Frankfurt

Diesel may not be the first thing that comes to mind when you think of Porsche, but in the European market - that vital one which Porsche calls home - diesels are indispensable. Particularly when you're trying to extend beyond niche sports cars and into the mainstream luxury sedan market as Zuffenhausen has with the Panamera. In fact, diesels account for 15 percent of Panamera sales worldwide (even though they're not offered Stateside), so to keep oil-burning customers happy, Porsche has announced a series of upgrades.
Set to be unveiled in the flesh at the fast-approaching Frankfurt Motor Show, the new Panamera Diesel packs 300 horsepower. That's 50 hp (or 20 percent) more than the model it replaces, significantly dropping the 0-62 sprint from 6.8 seconds to 6 flat, and raising top speed from 152 miles per Autobahn-crunching hour to 161. While they were at it, Porsche's engineers also fitted the rear differential with torque vectoring (previously reserved for gasoline-burning models) and retuned the transmission and suspension.
You can delve into the press release below for all the details - including the new model's improved towing capacity! - but the reality, for better or worse, is that the Panamera Diesel isn't offered here. So if you've been celebrating Labor Day (or even Labour Day, for our friends to the north) like we have, don't go looking for it at your local dealer, who will have only a Cayenne Diesel to show you instead.