1999 Audi A6 Quattro Base Sedan 4-door 2.8l Low Miles 96k Safe, Fully Loaded on 2040-cars

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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.

Audi TT RS shows its meaner face in new spy shots

When it launched, the original Audi TT RS was considered quite a sharp combination, melding a 360-horsepower turbocharged engine and all-wheel drive into a rather lithe, little coupe. Audi is ready to revive that great idea and is preparing for a return on the automaker's latest platform. Thanks to these new spy shots from near the Nurburgring, we can at least get a good idea aesthetically of what's in store for this future member of the RS family. There's absolutely nothing subtle about the front end, and the camouflage does little to hide the larger intakes at each corner. In profile, you can also spot larger brake discs peeking out from behind the wheels, and the side sills appear slightly thicker than the current TTS. The rear is all business, as well, with a lower apron and two big oval exhausts. The new TT RS reportedly arrives in 2016, at least in Europe, and a debut is possible at the Geneva Motor Show in March. The coupe would then potentially come to the US later in the calendar for the 2017 model year. Unlike the last TT here, which got a manual transmission, rumors suggest that the latest one would only offer a seven-speed dual-clutch gearbox. There's not likely to be any disappointment about the power, though, because it supposedly grows to about 400 hp thanks to an upgraded 2.5-liter turbocharged five-cylinder. Related Video:

Audi SQ7 spied for the first time

Audi isn't really hiding that its engineers are hard at work on a high-performance version of the latest Q7. However, we haven't seen any of the fruits of this labor, until we got these fresh spy shots of the SQ7. With seemingly no camouflage on the car, these photos might give a very good idea of what to expect from Audi's speedy SUV. One big tip-off of the model's performance aspirations is the redesign of the front end's lower portion. New ducts beside the foglights send cool air to what appear to be intercoolers. This test model rides on a very cool-looking set of basket-weave style wheels, and the big, cross-drilled brakes are easy to spot behind them. At the rear, the quad exhaust tips also signal something special. Our spies also snapped some shots of the interior. If there is any question about whether this is the SQ7, these photos certainly assuage it. The badging is plain as day on the gauges, but at this point the changes appear to be fairly minimal beyond that. We know the SQ7 is going to get more power, but the method isn't officially confirmed yet. Although, Audi technical boss Dr. Ulrich Hackenberg said bluntly last year that it would use an electrically turbocharged engine, possibly an evolution of the V6 diesel in the RS5 TDI Concept. Hackenberg also suggested that the SQ7 would go on sale in 2016. Though, the actual debut might come earlier. Regardless, the tweaks should make the SUV quite a performer. Even on the standard version, it weighs 700 pounds less than the previous generation, while remaining about the same size.