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BMW M3, M4 let loose on the 'Ring

We just posted our first drive of the 2014 BMW 435i yesterday, but for those wanting even more power from this stylish coupe, help is on the way. From the sounds of it, BMW will be showing off a production-ready concept previewing the M4 next month at the Pebble Beach Concours d'Elegance, but until then, we have some new spy shots of the performance coupe being tested at the Nürburgring, along with its four-door counterpart, the M3.
Despite all the camouflage, it doesn't take much imagination to picture what both cars will look like, since we can clearly see the more aggressive front fascia and beefier brake setup. One interesting element we see on both cars is a double bubble roof that is almost certainly made from carbon fiber. Based on our report earlier, both the M4 Coupe and M3 Sedan are expected to debut at the 2014 Detroit Auto Show.

Thermal imagery of BMW M4 DTM pit stop is red hot

A pit stop is a pit stop, right? The race car pulls in, the crew changes the tires, pumps in some fuel, maybe swaps out a busted body panel or squeegees the windshield, and off it goes for another heat. Only pit stops have become the focus of news lately for a number of reasons, whether it's because of mishaps (like the ones that prompted F1 to ban mid-race refueling), new time records (due largely to said ban) or interesting new ways to film the fast-paced action.
A few weeks ago we brought you footage of an IndyCar pit stop filmed from multiple angles courtesy of Google Glass. Now BMW has released a brief clip of one of its M4 DTM racers coming in for fresh rubber, all filmed by infrared camera. Its the kind of technology BMW uses to help optimize its German touring cars for competition, and now the Bavarian outfit has released some footage for fans to enjoy.
The resulting thermal imagery gives you an idea of how hot the car runs (and where the heat is emanating from), how warm they get the fresh rubber before they get it onto the car, and what kind of temperatures the pit crew is subjected to. Look closely enough in the 25-second video below and you'll even see the heat sputtering out of the exhaust pipes as the M4 downshifts into its pit box. (Just don't try adjusting your speakers, the clip is without audio.)

Mini JCW Paceman vs. BMW M135i in family faceoff

Over the last year, we've had the chance to drive two of the most exciting hatchbacks in the BMW family - the BMW M135i and the Mini Paceman John Cooper Works - but Autocar has managed to get the two corporate cousins together for a head-to-head comparison. Just like our initial impressions of the Paceman JCW, Autocar has little to complain about this new 215-horsepower hatchback... until it begins to factor in the faster, better-mannered and similarly priced M135i.
Despite laying down an extra 100 hp and delivering a 0-60 time that is almost two seconds quicker, the M135i carries the same price tag of 29,535 pounds in the UK; US pricing for the Paceman starts at $36,200, while it still isn't even clear if the US will be getting the M135i. Even more surprising is the fact that the Paceman falls short of the M135i in regards to rear seat and cargo volume, and just barely squeaks out a win in the fuel economy department. Scroll down to watch the BMW versus Mini hot hatch battle.