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Audi is working on a suspension that gets power from bumpy roads

Regenerative brakes aren't new. They're on virtually every hybrid and EV, and they're even starting to pop up on traditional gas-powered cars, like with the i-ELOOP-equipped Mazda6. But even with these systems, cars can get more efficient, and Audi thinks it found yet another source of wasted energy. The source? The suspension. The idea is to turn the kinetic energy that goes into the dampers into usable energy instead of as waste heat. Audi isn't the first auto company to come up with regenerative suspension – nearly three years ago, ZF introduced its GenShock technology, which used a valve attached to traditional, oil-filled hydraulic shocks to recapture kinetic energy from movement caused by bumps in the road. Audi's prototype technology, which it calls eROT, replaces traditional dampers with horizontally oriented electromechanical rotary dampers. eROT is apparently short for electromechanical rotary damper. Neat. In testing, eROT recovered an average of 100 to 150 watts on a typical German road, three watts from a fresh piece of pavement, and 613 watts on a rough stretch of tarmac (wattage is calculated as power over time, so this is actually the rate at which the system harvests energy). The dampers channel that energy to a tiny, 0.5-kWh, 48-volt battery. The prototype is claimed to cut CO2 emissions by three grams per kilometer (4.8 grams per mile), while the company believes a future production version could save up to 0.7 liters of fuel per 100 kilometers of driving. Converting the savings to American miles per gallon isn't easy, so we'll use a practical example. In the US, the Q7's supercharged 3.0-liter V6 returns a combined rating of 21 miles per gallon, which works out to 11.2 liters per 100 kilometers. Apply eROT's 0.7L/100km savings, and the Q7's economy would improve to 10.5L/100km, or 22.4 mpg, a 1.4-mpg improvement. That's not huge, but because math, 0.7L/100km is more dramatic on a more fuel efficient vehicle – taking an A3's 27-mpg combined rating and adding eROT would drive efficiency up 2.4 mpg, for example. There are a few other big benefits beyond fuel and emissions savings – Audi claims eROT provides a more comfortable ride than traditional active suspensions, because engineers can tune the compression and rebound strokes independently of each other. Beyond that, the horizontally oriented rear suspension geometry means more cargo space, since the dampers don't poke up into the cabin like they normally do.

2018 Audi RS3 Sedan to make US debut in 2017 [UPDATE]

UPDATE: We've heard back from Audi, and the statement was as expected. According to spokesman Mark Dahncke, there's "nothing we can share at this time." We really want the Audi RS3 to come to the US market, and based on a report from Car and Driver, it doesn't sound like we'll be stuck waiting that long. The report claims the new compact rocket sedan will debut next year as a model year 2018 vehicle. Beyond that date, C/D's report expands on some of the details we reported on in our RS3 Sedan report from February. It backs up the claim about a 2.5-liter, turbocharged five-cylinder, but instead of a 400-plus-horsepower engine, C/D's report says it'd be "close to" 400 hp. That power would come from a turbocharged, 2.5-liter five-banger that's distinct from the unit currently offered in the Euro-market RS3 Sportback and the last-generation TT RS (the new 2.5 would first debut in that car's replacement). The new powerplant would be paired with Audi's seven-speed S-Tronic. According to C/D, all this powertrain goodness will allow the new RS3 to hit 60 in four seconds flat and run up to 174 miles per hour. If correct, that means Audi's newest high performer will be a tenth of a second faster to 60 and have an extra seven mph on the high end than the most potent Mercedes-Benz CLA45 AMG. And while the two-door BMW M2 isn't necessarily a direct competitor – because coupe – it's worth pointing out that the RS3 will be 0.2 seconds faster to 60 and have an extra 19 mph to its top speed. While C/D's report cites a "highly reliable source" for its information, we've naturally reached out to Audi to confirm as much as possible. We'll update this post as soon as Audi's PR team gets back to us. The company basically gave the usual "No comment." Related Video: News Source: Car and Driver Rumormill Audi Luxury Performance Sedan

Latest Forza Motorsport 5 car pack leaves us scratching our head (in a good way) [w/video]

As we scrolled down the roster of the latest car pack for Forza Motorsport 5, the Hot Wheels Car Pack, our expression became bemused over the strange mix of vehicles that we now have at our disposal. This is quite unlike any of the other sets of DLC Turn 10 Studios has offered. Sure, there are the typical headliner cars – the Lamborghini Veneno and 2015 Audi S3 – that will appeal to the mainstream racing fan or auto enthusiast. But this latest car pack is so jammed full of nuggets of automotive weirdness that it's hard not to get excited. The Hot Wheels pack has no shortage of racers, with a particular focus on historical offerings. A 1939 Auto Union Type D covers the pre-war era of Formula One, while a 1967 Lotus 49 and a 1952 Ferrari 375 represent post-war racing. For a modern twist, a Mazda USF2000 car slots in below the Indy Lights car from the Nurburgring booster pack. From here, things get vintage and weird. There are a pair of delightfully offbeat coupes, in the form of a 1974 Toyota Celica GT and a 1973 Ford XB Falcon GT (here's hoping we get a vintage Holden Monaro in the future). Those two are joined by a 1956 Ford F-100, which your author already plans on converting into a dragster with vinyl flames down the side (because that's what all vintage pickups should be). The new ride we're most excited about, though, is the 1983 GMC Vandura G-1500. Yes, that's the van from The A-Team, and we're sure it will prove to be an excellent canvas for the artists of FM5 to cover with airbrushed, fire-breathing unicorns and mystical, gray-haired wizards (or just poorly painted letters that read "Free Candy"). This latest car pack is the final monthly car pack for FM5, although Turn 10 is quick to point out that while the monthly updates are over, there will still be new batches of cars made available to gamers. As for the Hot Wheels pack, it's available now on Xbox Live for $9.99. Scroll down for the press release from Turn 10 Studios, as well as a video of the newest additions to Forza Motorsport 5's vehicle roster. Forza Motorsport 5 Hot Wheels Car Pack Now Available Turn 10 Studios is bringing the Hot Wheels® Car Pack to "Forza Motorsport 5," available for download today. The pack features a collection of vehicles built from the ground up for the new generation that car fans can collect and customize while putting their virtual driving skills to the test.