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Porsche 911 Aerodynamic prototype cheated the wind ahead of its time

You might think that sports cars would have the lowest drag coefficient of all cars. And yes, they do tend to be more slippery than, say, SUVs or convertibles, but the sleekest vehicles on the road tend to be EVs, hybrids and luxury sedans. Sports cars, on the other hand, have aerodynamically detrimental needs for downforce and additional engine cooling. Still, the Porsche 911 is better than most, and has only gotten more so over the years. Its relatively narrow track and compact form mean it has a smaller frontal area than some other sports cars, and the gradual sweeping back of its headlights and windshield have only augmented its capacity for cheating the wind.
This 911 prototype, however, is even more aerodynamic than most. It's based on a "G model" 911 from 1984, but employed such features as covered wheels, a new rear spoiler and a reprofiled front end to drop its drag coefficient from 0.40 to 0.27, making it as slippery as a modern sedan and better at cheating the wind than just about anything built up to that point, save for maybe the Tatra 77, Citroën SM or Tucker Torpedo.
Elements of this prototype ended up gradually making it into production Porsches for years to come, and you can clearly see early influences on the second-generation 964 and even on the 959. It's featured here as the latest installment in a video series on rare historic Porsches unearthed from the company archives, following previous clips that featured a rare V8-powered 911 and a mid-engined 911 prototype. Scope out the latest episode in the video below.

Watch Porsche's 918 Spyder break a sweat while hot weather testing

With five months left until the 2015 Porsche 918 Spyder enters production, Porsche engineers are still putting the hybrid sports coupe through a battery of last-minute tests. To give us new reasons to ogle over the car - as if we needed any more - Porsche has released a short video showing the 918 Spyder undergoing shakedown tests in the hot Nevada desert. And you can't drive through Nevada without visiting Vegas, too, right?
Although there's really nothing new to see in this video, it's still fun to watch as Porsche approaches one million test miles logged on this exciting new high-performance model. One interesting part (at around the 0:37 mark) shows the car taking off under electric power and then transitioning to engine power, which results in a mix of whirs and growls as the 918 Spyder switches from a 127-horsepower electric vehicle to an 887-hp hybrid supercar. Scroll down to watch - and hear - Porsche's latest creation in motion.

40+ cars that barely avoid the gas guzzler tax

The Gas Guzzler schedule, with mpg ratings and charges that haven't changed since 1991, lays out which fuel-swillers owe what to Uncle Sam.
I started thinking about the "Gas Guzzler Tax" - considerably less well known as The Energy Tax Act of 1978 - when I was driving Dodge's new Challenger SRT Hellcat last week. Unsurprisingly for a car that can burn 1.5 gallons of gas per minute at max tilt, theoretically able to empty a full tank of premium in about 13 minutes, the Hellcat will be subject to the Gas Guzzler Tax schedule when it goes on sale.