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The 2017 Porsche 911 RSR goes mid-engine, purists be damned

Porsche unveiled its World Endurance Championship and IMSA WeatherTech Championship competitor with the 2017 911 RSR. And this 911 is different from the rest, as the 4.0-liter flat-six engine powering this beast is in front of the rear axle, not behind it. That's right, this 24 Hours of Le Mans competitor ditches the iconic rear-engine layout. Porsche isn't talking specifics on how exactly things are arranged back there. The engine is new, now based on the 991 911's block instead of the previous Mezger motor that's been used for years. The transmission design is new as well – it would have to be to accommodate the new location relative to the engine. The racecar has been engineered to meet the LM-GTE class, where it will go up against other mid-engine cars like the Ford GT and Ferrari 488 GTE. Moving the engine to the middle has given Porsche the ability to fit the 911 RSR with massive bits of aero, like the humongous rear diffuser that looks like it would be more at home on a machine of war. The only thing that can compete with the diffuser for size is the top-mounted rear wing, which shares a similar design to the one found on the 919 Hybrid. Going back to the engine, the direct-injected boxer motor, depending on the size of the restrictor, generates as much as 510 horsepower and sends all of its fury to the rear wheels. The engine is paired to a six-speed sequential gearbox, which drivers can employ through paddles on the steering wheel. The new engine doesn't have a lot of weight to push around as the 911 RSR, as required by regulations, weighs 2,740 pounds. Speaking of weight, the engine layout isn't the only change for the 911 RSR. For 2017, the car ditches its steel body for one that's made out of carbon fiber. The body attaches to the chassis via quick-release fasteners, making the vehicle easier to service as exterior elements can be removed with minimal effort. The racecar also gets a radar-based collision system – aptly named the "Collision Avoid System" – which is meant to limit the 911 RSR's encounters with faster LMP prototypes. Only time will tell if the new layout and aerodynamic components help the 911 RSR beat its competition. But there will be plenty of opportunities to see the racecar in action as Porsche plans to run the 911 RSR in 19 races during the 2017 season, the first of which will take place at the IMSA opener on January 28th at Daytona, where the racecar will make its track day debut.

Next Mini Clubman disguises all six doors

After revealing the new Mini hardtop in various guises, the next new model in the pipeline from the retro British marque is the Clubman. And here it is. Though still wearing some swirly camouflage, this Clubman prototype - previewed by the concept showcased last year - is clearly nearing production readiness. Since it'll have to differentiate itself from the four/five-door version of the new hardtop, the Clubman is expected to be even longer than the model it replaces. And this time, it'll have rear doors on both sides; and from these spy shots, it looks like they'll be conventional, full-size, front-hinged portals, instead of suicide doors. Around back you can also see the taillights peeking through the camo, on split rear portals instead of the one-piece, top-hinged tailgate on the standard-wheelbase model. At this stage, we wouldn't be surprised to see the new Clubman appear for the first time at the upcoming Geneva Motor Show. Whenever it does bow, it'll serve as the second pillar of the brand's reconfigured product lineup, following the new hardtop and preceding the upcoming next-gen Countryman crossover, Superleggera roadster and Minor city car.

Xcar takes the Mini Challenge, and it sounds awesome

The third-generation Mini is well and truly on sale in markets across the world. The new four-door model should be arriving soon, if it isn't already on sale in your neck of the woods, and the latest John Cooper Works model made its official debut just a few weeks ago at the 2015 Detroit Auto Show. We aren't going to be talking about any of those right now, though. That's because our chums at Xcar took it upon themselves to sample the third-generation Mini Challenge racecar, a 275-horsepower, hardcore, fully committed competition version of the otherwise adorable Mini Cooper S. At roughly 30,000 British pounds (about $45,200 at today's rates) there's a lot to like about the Challenge car. Aside from a gutted cabin and aggressive aerodynamic kit, the racer has been fitted with slick tires, a Quaife sequential gearbox, adjustable dampers, Alcon brakes and a consequently lower curb weight – under 2,600 pounds with an average-sized driver. It's fair to say the Challenge driving experience figures to be unlike your typical road-going Mini. And considering that, we think the folks that built the car, Total Track, have fulfilled their promise of delivering a "touring car experience at a fraction of the cost." Have a look at the Xcar video and let us know what you think. Be sure to crank up your speakers, because the Challenge sounds excellent.