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Porsche testing four-cylinder Boxster at the N?rburgring

Porsche recently introduced a four-cylinder version of the new Macan for markets outside of North America, carrying Zuffenhausen's first four-pot since the 968 ended its production run the better part of two decades ago. But you can bet the compact crossover won't be the only Porsche to get the four banger before all's said and done. These spy shots, we're told, are evidence of just that.
Spotted undergoing testing at the Nürburgring (where else), this modified Boxster, our spy photographers tell us, sounds more like a four-cylinder engine than the flat six that's powered (in displacements ranging from 2.5 liters to 3.4) every version of the little roadster since its introduction in 1996, the year after the last four-cylinder Porsche ended production.
The test mule is also wearing modified wheel arches and aerodynamic aids under the bumpers, front and rear. Just what they're doing there we're not sure, but we'll probably find out sooner or later.

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).

McQueen's Porsche 917 from Le Mans races to the auction block

Steve McQueen may have been the headline actor of the motorsport cult classic film Le Mans, but we all know who the real star was. Or rather, what: the Porsche 917. More specifically, it was the Gulf-liveried #22 - not McQueen's #21 - that won the race, making it one of the most iconic cars ever to drive across the silver screen. And now it's going up for auction.
This 1969 Porsche 917K, chassis 917-024, has a storied history both on and off the screen, even if it didn't win any (off-screen) races of note. This example was the first 917 to be campaigned in an actual race when Porsche handed it to Jo Siffert to drive against the Ferrari 312P and Ford GT40 at the Spa-Francorchamps 1000 Km race in 1969. Siffert found the early example too unstable and ultimately drove an earlier 908 to the checkered flag, but after 917-024 set the fastest time at the following year's Le Mans test day, Siffert acquired it outright.
The Swiss racing driver loaned the car to Solar Productions for use in the film, after which it returned to Siffert's collection until he was killed in an F1 exposition race at Brands Hatch in 1971. In a testament to how much he loved the car, it was 917-024 that lead the funeral procession. The car subsequently fell off the radar until it resurfaced in 2001 as one of the greatest barn finds of the new millennium. Now fully restored and resplendent in its original baby blue and orange, 917-024 is headed to the auction block at Pebble Beach where you can be sure that Gooding & Company will bring in a suitably high price for arguably the most iconic example of one of the most iconic Porsches of all time.