2012 Audi Prestige 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 S3 starts at $41,400, A3 Cabrio rings up at $35,600 and A3 TDI priced from $32,600

Audi has released the official pricing info for the all-new A3 TDI Sedan, A3 Cabriolet and the S3 Sedan, and the news appears pretty good all around. As usual, none of the following prices include Audi's unspecified-for-now destination charges.
The big news is the S3, complete with 292 horsepower, a six-speed dual-clutch transmission and Quattro all-wheel drive. Prices start at just $41,100, which is a decent savings over the more powerful, 355-hp Mercedes-Benz CLA45 AMG.
The new A3 TDI sedan, meanwhile, has a starting price of just $32,600. While you'll be certain to save some money on fuel, you'll be doing so without Quattro all-wheel drive. Still, the improved economy of the 2.0-liter, turbodiesel four-cylinder isn't priced too steeply, relative to the gas-powered A3's $29,900 starting price.

Audi TT Sportback Concept rounds out an icon

That German automakers seem singularly fixated on filling any white space between their models isn't new - the last decade-plus has seen their showrooms overflowing with niche models, some of which seemingly occupy sub-genres of sub-genres. To our eyes, there's often diminishing aesthetic and utilitarian returns to go along with the heightened price tags that accompany these models, but we're beginning to think Audi is tackling its personal diversity initiative best. Unlike the often heavy-handed designs from rivals (we're looking at you, BMW), Ingolstadt seems to be doing doing a more graceful job of carving out models between models. The latest proof of this is the TT Sportback Concept, just unveiled here at the Paris Motor Show.
After showing off its Allroad Shooting Brake Concept in Detroit and, more recently, in the Offroad Concept in Beijing amidst rumors of the TT sports car platform expanding into an entire family, we're not surprised to see this more utilitarian five-door hatchback showcar here in France. This, despite the fact that Audi already counts similarly proportioned A5 Sportback and A7 Sportback models in its lineup.
Of the TT line extension concepts, this Sportback certainly looks the most production ready, with a bare minimum of showcar tinsel masking realistic proportions and detailing. We think it's quite handsome from stem to stern, even if it's a bit familiar looking. The design incorporates Audi's trademark big-grille look with the TT's prominent arched roofline and heavily radiused fenders, along with a rear lighting graphic that subtly echoes the A3. Despite its leggy looks, the TT Sportback Concept is surprisingly compact, spanning less than a foot longer overall than the production 2016 TT despite its 4.7-inch longer wheelbase and extra set of doors. Those sleek looks come at least partially as the result of an overall height that sits 1.2 inches lower than the TT coupe.