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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.

Adam Carolla is world's the least helpful test drive co-pilot

If you were going to test drive a new car, who would you want to take with you? Your spouse? A friend? Maybe an automotive journalist? Well take it from us: there's one of us riding shotgun just about every time we go to drive anything, and we're not all we're cracked up to be.
How about a celebrity comedian? Well, that largely depends on which comedian we're talking about here. Some - say, Jerry Seinfeld or Jay Leno, for example - might be more helpful than others, being more or less schooled in the finer points of the modern automobile. Adam Carolla might seem like he belongs on that list too, but in this latest video for a friends at Edmunds.com, the one-time host of The Car Show on Speed TV seems bent on being as comedically intrusive as possible. Which may be funny, but helpful? Not so much. See what we mean in the video below, and the next time you go to test drive a new car, you just might find the world's most popular podcast host climbing in with you.

Audi updates the RS3 hatch to sedan specs, but we still aren't getting it

As great as the upcoming Audi RS3 sedan looks and sounds, we're still a bit jealous of the Europeans and others who get the five-door Sportback version. And now even more so, because for 2018 the RS3 Sportback is being updated to match the specs of the RS3 sedan that debuted last fall at the Paris Motor Show. We'll see the revised extra-hot hatch next month in Geneva. Even though we haven't had a chance to get behind the wheel of either model, the raw numbers alone get us excited. An updated Quattro all-wheel-drive system, a 400-horsepower turbocharged inline five-cylinder engine (up from 362), and a seven-speed dual-clutch transmission will send the 2018 RS3 hatch from 0 to 60 mph in 4.1 seconds. That puts it in Porsche 911 and Chevrolet Corvette territory. Other improvements include a wider track to fit wider rubber, a lowered and stiffened suspension, and a larger set of brakes. Carbon-ceramic front rotors will again be available, like they are on the sedan. Inside, the RS3 comes with a boost pressure indicator, an oil thermometer, and a lap timer. Audi's Virtual Cockpit fully digital instrument panel is available as an option, and one we highly recommend. Aside from all of the performance and tech upgrades, the RS3 has a number of changes to the interior and exterior design. Black Nappa leather sport seats are standard, with special contoured RS sport seats available as an option. Lighting elements have been updated to match those of the restyled A3 and S3, the front fascia has been sharpened, with larger intakes on the bottom corners of the bumpers, a slightly more aggressive front splitter, and the Quattro logo emblazoned on the bottom of the grill. Out back, the car gets two large exhaust tips compared to the S3's four outlets. The overall design is typical Audi: handsome, but conservative. The RS3 sedan goes on sale in Europe in April with the Sportback following soon after. We'll have to make do with the sedan version, which is expected to arrive here next year. The only Sportback model Audi offers here from the A3 family is the plug-in e-tron model, and we don't expect that to change any time soon. But we can dream. Related Video: