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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.

The greenest cars of 2024: Vehicles that use the least fuel and cost less to operate

All-electric vehicles may make headlines for environmental friendliness and fuel efficiency, but the “greenest” car in America in 2024 has a gasoline engine. According to the American Council for an Energy-Efficient Economy's annual GreenerCars ratings of the most environmentally friendly cars, the latest Toyota Prius Prime SE plug-in hybrid tops the list of greenest cars, although it's something of an anomaly, because battery-electric EVs follow it in spots two to five. Of the top 10 vehicles in the ratings, six are electric and four are hybrids: Rank Make & Model Powertrain Green Score MSRP Estimated Annual Fuel Cost* 1 Toyota Prius Prime SE PHEV 71 $32,975 $529 2 Lexus RZ 300e EV 67 $55,150 $651 3 Mini Cooper SE EV 67 $30,900 $747 4 Nissan Leaf EV 66 $28,140 $741 5 Toyota bZ4X EV 66 $43,070 $689 6 Toyota RAV4 Prime PHEV 64 $43,690 $741 7 Hyundai Elantra Blue Gas Hybrid 64 $26,250 $864 8 Hyundai Kona Electric EV 63 $34,050 $695 9 Toyota Camry LE Gas Hybrid 63 $28,855 $907 10 Kia EV6 EV 63 $43,975 $689 11 Toyota Corolla Gas Hybrid 62 $23,500 $944 12 Hyundai Ioniq 5 EV 62 $41,650 $737 *ACEEE analysis using EIA data of annual cost—from gasoline, electricity, or a combination—of driving 15,000 miles The ACEEE also compiled two other vehicle rankings: the so-called “Greener Choices” and the “Meanest List.” The Greener Choices list includes a variety of high-scoring conventional vehicles, and the Meanest List identifies the worst-performing mass-market models. Finishing first in the “greener” list — which the organization says is about cars “available nationwide with among the lowest environmental impacts” — is the Honda Accord Hybrid. As far as the “worst-performing mass market” vehicle, that dubious distinction goes to the $184,000 Mercedes-Benz AMG G63. “ItÂ’s important for automakers to keep expanding affordable EV options rapidly so that the benefits of EVs are available to drivers across a wider spectrum of incomes as we transition away from cars that burn gasoline,” said Peter Huether, ACEEEÂ’s senior transportation research associate and lead researcher for the GreenerCars rankings. “For drivers whose needs are not met by todayÂ’s charging infrastructure, many efficient and affordable hybrid options are available.” Just over half the cars on the 2024 Greenest List start at under $35,000, including four EVs and three gas hybrids.

2020 Mini E spy photos reveal its interior

The 2020 Mini E electric hatchback has been spied once again. It doesn't reveal much on the outside, in fact it actually shows less than the last time, since this one doesn't have the groovy concept-inspired wheels. But our spy photographer managed to get a good shot of the interior, which reveals some neat details. Chief among the interior's changes is the instrument panel on the steering column. While current gasoline-powered Minis have a typical needle-and-dial set of gauges on the column, those have been replaced by a thin screen. In an effort to keep it from looking too out of place, it has semi-circle ends and a chrome ring around the screen. Odds are that the actual screen will likely be in the middle, and additional warning and indicator lights will fill up the circular ends. Other than the screen, the only other major change is the shifter. Instead of the round leather knob of conventional automatic Minis, it has a more rectangular knob made entirely of plastic. The rest of the Mini's interior is like any other current model. The vents, controls and infotainment are all taken right from the other Minis. Interestingly, this Mini E has carbon fiber interior trim. This will probably be an option, not standard equipment. We expect the electric Mini Hardtop will make its debut sometime next year. If we're lucky, it may make the same 204 horsepower and 162 pound-feet of torque as the original Mini E and more than that car's 150 mile range. Related Video: