2007 Pontiac G6 Gt Convertible 2-door 3.5l on 2040-cars

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1939 Pontiac Ghost Car commands $308,000 at auction

For the 1939 World's Fair, Pontiac built a Deluxe Six bodied in Plexiglass. Part of the Previews of Progress pavilion in which General Motors' Futurama showed off what was to come in the world of autos, the 'invisible' Pontiac is credited as the first transparent car in America. And there were no shortcuts taken with its body: the Plexiglass form was fabricated by the company that brought the material to market in 1933, Rohm & Haas.
The see-through sedan was sold at RM Auctions' St. John's auction in Michigan on July 30, fetching $308,000. Not bad appreciation for a domestic oddity that cost $25,000 to build when new. You can check out the high-res gallery of its innards, including copper and chrome metalwork and white moldings and wheels, and get the exhaustive details on it after the jump.

'We're not a hedge fund': Porsche plans to curtail speculators and flippers

A sizable number of speculators view cars as an investment. Rare or unusual models are quickly snapped up and either parked for years or flipped for a profit. Cars from automakers like Porsche and Ferrari are more prone than others, and at least some people behind these models are getting a bit tired of it. While it's difficult to police what goes on after you sell a car, Porsche has some plans that might curtail the problem before it starts. Andreas Preuninger, the head of GT road-car development and the man behind the new 911 GT3, spoke to Car and Driver at a recent event. "I personally like to see my cars being used," he said. "That's what we build them for. They are just too good to be left to stand and collect dust." One recent example of this rampant speculation is the 911 R. While the special manual-only model sold for $185,950 when new, used versions were selling for nearly $1.3 million just months after it went on sale. While the car is a masterpiece and an instant classic, a good number will be parked and simply used as art and not the rolling testaments to the man/machine interface they were intended to be. The concern over valuations has become so fierce that some owners are upset that Porsche is offering the new 911 GT3 with a manual transmission, fearing that it may hurt the value of the 911 R. "When I said we're not a hedge fund, I'm talking to those people who are yelling at us for offering the manual transmission similar to the R," Preuninger said. "But if there are people wanting to buy cars like that, then as a company we should try to fulfill that, to meet that demand." It seems Porsche is keeping a close eye on who is flipping cars. Since there is often far more demand than supply with certain models, the German automaker has a name for every car before it's built. Buyers with bad reputations might not even make the wait list. Related Video:

Drive plays Smokey, Bandit with turbo Trans Am

The modern trend for powertrains can be summed up with the simple maxim: cut displacement and add forced induction. Whether you are looking at the just-introduced 2016 Chevrolet Cruze or a BMW M3, this adage holds true. However, Pontiac's attempt at the idea goes all the way back in 1980 with the Firebird Trans Am and its turbocharged 4.9-liter V8. Drive's Mike Musto takes out a 1981 example to explain what makes this largely forgotten muscle car so special, and it certainly isn't performance. While a 4.9-liter V8 might sound like a lot in the modern world, keep in mind that only few years before the second-generation Trans Am was available with up to a staggering 7.5-liters of displacement. Turbocharging of road cars in the early '80s was quite archaic by today's standards, and the Firebird only managed around 200 horsepower with this mill. Without much go, the turbo Trans Am made up for a lack of power with lots of show. As Musto points out, the famous flaming chicken adorns practically every surface you can see on the coupe, and boost lights on the hood illuminate when the turbo is spinning. Musto still finds a lot to like about the turbo Trans Am. He even calls it "Burt Reynolds as an automobile." Find out why the coupe is so special in this entertaining clip.