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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).

eBay Find of the Day: 1981 Porsche 928 convertible by Carelli

The Porsche 928 was perhaps the consummate European GT of its day. With a powerful front-mounted V8 engine that grew in displacement as the model years went on, it was capable of eating up the miles at triple-digit speeds in great comfort for occupants. It was also an unusual beauty, with its sharp front and curved rear featuring innovative integrated bumpers.
Currently for auction on eBay Motors is one of the rarest 928s you're likely to find, in a handsome combination of Guards Red paint and tan leather interior, though we wouldn't mind a less-showy finish to the factory wheels. According to the seller, this car is one of eight 928 convertibles by Carelli Design, a firm that's still in business.
The auction claims that these cars were made in 1981 as a feasibility study between Carelli and Porsche for a possible production 928 convertible. The seller says he worked at the dealership where the car is said to have been originally sold $103,000. To remove the roof and hide the convertible top, there were significant changes made to the body and interior, including redesigned doors and a completely new trunk. As you can see in the gallery, when down, the top is completely hidden in a very factory-like fashion. When up, it looks slightly awkward, though (and we'd really like to see a rear three-quarter view to check out the blind spots).

Chevy Corvette Stingray defeating rivals where it matters most

Everything is coming up roses for the award-winning Chevrolet Corvette Stingray, as new data from the North American Dealers Association dissected by GM Authority reveals that America's sports car is handily outselling two of its more expensive rivals.
Through June of 2014, the NADA notes that the Corvette has rung up 17,744 sales, handily besting the Porsche 911 and positively spanking the SRT Viper. Of course, you're sitting there thinking, "Corvette is outselling the much more expensive Porsche and Viper. Sky blue, water wet." But what's impressive here is just how thoroughly the Chevrolet is beating its two rivals, with this data serving as a testament to just how popular the seventh-generation sports car has become.
So far this year, Porsche has managed to move 5,169 911s, according to NADA. Considering that the base model starts at nearly $15,000 more than the most heavily optioned Stingray, and that Porsche owners have a vast, expensive options catalogue to select from, Stuttgart's sales are still plenty impressive in relation to the nearly 18,000 Corvettes sold.