1987 Porsche 911 Carrera Turbo 2dr Cpe on 2040-cars

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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.

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.

2015 Porsche Boxster GTS [w/video]

You know the sound: the startling pop-brraaap-pop-pop shotgun fire of unspent flammables coursing through exhaust pipes that usually signals a raw, naughty powerplant beneath the hood.
But when you're nestled in the Porsche Boxster GTS' snug seats, it's not a crackling small block V8 or a high-strung Italian flat crank making the devilish racket, but rather the new king of the Boxster/Cayman lineup, a 3.4-liter flat-six that produces 330 horsepower and 273 pound-feet of torque.
Within the emotional vacuum of a spec sheet, the Boxster GTS' pumped-up grunt seems pretty mild, with a gain of only 15 hp and 7 lb-ft, respectively. But the reworked acoustical experience goes a long way towards suggesting the GTS has a trace of racing blood in its veins, and might even be missing its catalytic converters. In addition to the sonorous, centrally positioned tailpipes, the cabin also fills with lovely mechanical strains thanks to the "Sound Symposer" acoustical amplifier that's trickled down into the Boxster/Cayman lineup from the 911 for the first time. Boxster S, we hardly knew ya.