2009 Dodge Challenger R/t on 2040-cars

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Chop the top of your new Dodge Viper for $35,000

We have good news, and we have bad news. First, the good: It's now possible to get a brand-new Dodge Viper roadster, which is nice, considering we're in the dead of summer and many of us like wind-in-the-hair motoring. Now, the bad: This is not a factory option from the automaker, instead coming courtesy of an aftermarket company called Prefix Performance, and that means it's going to cost you some serious coin.
Called Medusa, this drop-top Viper was created without the knowledge or consent of Dodge, but that's probably fine because Prefix works with the automaker already for the final preparation of the American supercar, including paint. According to the company, the current, fifth-gen Viper was built with a convertible version in mind, so no chassis strengthening is required. From the looks of the somewhat grainy photos available, the conversion appears of very high quality.
Want one? Well, that means you're going to need to procure a Viper - Prefix has 10 units ready for transformation as it stands - and that's going to cost at the very least $102,485. Then, you'll need to write a check for an additional $35,000 for Prefix to surgically remove the car's roof. Thing is, for that kind of cash, a prospective owner could buy, among other very nice options, a Viper hardtop and a loaded Miata, or a Corvette Stingray convertible and several pockets full of change. Or, perhaps a new Viper hardtop and a used, first-gen Viper convertible?

Top horsepower-per-dollar cars in 2017

Bang for the buck. That quasi-scientific statistic is bandied about by motor heads everywhere from classrooms to barrooms, though the truth of the matter is that it's exceedingly complex to measure. A fair performance-per-dollar index would include something like cross-referencing MSRP (Manufacturers Suggested Retail Price) with point-to-point times on a track or driving route, which is obviously hard to do comprehensively. But, for the sheer joy of talking about cars and playing with a big spreadsheet, there's always the horsepower-per-dollar index, which is more straightforward, albeit hilariously flawed. There are vagaries even with this simple formula, of course: MSRP for vehicles can change at a moment's notice, to say nothing of the bottom-line shifting that happens with local deals or showroom negotiation. For this list we're running with the straight MSRP wherever possible, and as recently reported as we can get it. All the vehicles on this list are 2017 models, and all trims are reported where the lowest price and differing power levels intersect. Some choices were made for personal preference and some for sanity, avoiding things like all 48 trim levels of the Ford Transit, all with the same horsepower). If this list were a simple top ten, or even a top fifty, you'd be bored to tears with all the red, white and blue that is represented. Following perfectly with conventional wisdom, American cars really do lead the world where hp/$ is concerned. So, for the sake of variety (and the sheer joy of seeing a minivan 'win' one round of this thing) I've sorted out some top five and bottom five lists for broad power categories. Let's dive in. Less Than 100 Horsepower Okay, okay, this is hardly a category we'll grant you. But we've often tried to click off all the sub-100-hp cars on sale in the US, and making this list gave us an excuse. It also illustrates that none of these smallish vehicles bring cheap horsepower to the table - for that you'll need a motorcycle. The segment-leading Chevy Spark (above) asks just over $139 for each hp, and that Smart Fortwo Electric Drive has hp on sale for about the same price as its very distant family cousin, the Mercedes-Benz SL65 AMG (insert your favorite Smart joke here... we know you want to).

Is Mopar readying a special-edition Dart for Chicago?

Chrysler has released the above teaser of a limited-edition Mopar 2013 model that will be unveiled at next month's Chicago Auto Show. Although the automaker doesn't announce what vehicle will get the Mopar treatment, closer investigation of the seats and center console suggest that this car will be a special version of the 2013 Dodge Dart.
This will be the fourth Mopar model in as many years, following on the heels of the Mopar 2010 Challenger, Mopar 2011 Charger and the Mopar '2012 300. There are no details for the Mopar '13 Dart, but we do see that the car will retain the signature black-and-blue color scheme as past Mopar editions. Like these previous models, we expect production of Mopar '13 Dart to be limited to just 500 units.
Scroll down for Chrysler's press release teasing the new Mopar model, and we'll be sure to bring you plenty of live images from the show floor in a couple weeks.