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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 RS3 Sportback is the hottest hatch

Fans of compact, European vehicles that mix luxury and performance should be in paradise right now. There's already the 320-horsepower M235i from BMW and the 355-hp CLA45 AMG (or A45 elsewhere) from Mercedes-Benz, but you can now add one more to the list. Meet the Audi RS3 Sportback, which boasts 362 hp and five doors, too. With propulsion coming from Audi's turbocharged 2.5-liter five-cylinder that makes 343 pound-feet of torque (465 newton-meters), the RS3 Sportback can scramble to 62 miles per hour in 4.3 seconds. Top speed is limited to 155 mph, but buyers can opt to raise that top end to 174 if desired. The inline-five is mated to a seven-speed S-tronic dual-clutch gearbox, sending power to the ground via Quattro all-wheel drive with torque vectoring, which can send between 50 and 100 percent of the power to the rear wheels as needed. To cope with the boosted output, the suspension has been lowered by an inch compared to the standard A3 Sportback, and magnetic dampers are a further option. Buyers can also tick the box for carbon-fiber-ceramic brake rotors at the front. The RS3 goes on a diet its latest iteration, too, weighing 121 pounds less than its predecessor. While buyers get potent power, Audi keeps the looks understated. The exterior wears a front airdam with larger openings and some aluminum flourishes, and a diffuser at the back gets some more matte trim. A roof spoiler and aluminum look for the mirror housings add a few other touches to catch the eye. Inside, all versions get sport seats covered in Nappa leather and a flat-bottom steering wheel wrapped in leather and Alcantara. But for the really sporty look, buyers can spec optional RS buckets with a carbon shell that weigh 15 pounds less than the standard units. European deliveries of the RS3 Sportback begin in the summer. Autoblog reached out to Audi spokesperson Mark Dahncke who told us there are currently "no plans to bring it to the US." Scroll down to read Audi's full announcement of this five-door hot hatch. Power in compact form – the new Audi RS 3 Sportback Ingolstadt, 2014-12-12 Sporty top model of the A3 model series Most powerful production five-cylinder in RS history with 270 kW (367 hp) 0 – 100 km/h (62.1 mph) in 4.3 seconds – 0.3 seconds faster than the previous model Hot, throaty sound, exhilaratingly free-revving and brawny power – the five cylinder engines from Audi are legendary.

2016 Audi R8 looks like a promising second chapter [w/video]

Audi shook up the supercar market when it released the original R8 road car. Now, it's hoping to do the same with the second-generation of the handsome mid-engine star. But where the original R8 was something of an analog supercar, boasting a naturally aspirated V8 and a delightful gated shifter, this new model is something much different. Gone is the popular, high-revving 4.2-liter V8 and the snickety-snack transmission, although the 5.2-liter V10 that joined the original R8 later in its life remains. In base form, it turns out 540 horsepower in the second-gen R8, while the V10 Plus model can be had with an impressive 610 ponies. That's good for a sprint to 60 of just 3.5 seconds and a top speed of 201 miles per hour in the former and 3.2 seconds and 205-mph in the latter. A seven-speed dual-clutch transmission is the sole gearbox, sending power to a revised Quattro all-wheel-drive system that's capable of shunting 100 percent of the engine's torque to the rear axle. Meanwhile, Audi has managed to shave 441 pounds by using a new Audi space frame, with more aluminum and carbon fiber than before. Weighing in at just 3,205 pounds, the R8 is slightly lighter than the new, V8-powered Ferrari 488 GTB, although it's not quite as light as its cousin, the 3,135-lb Lamborghini Huracan. And of course, we can't forget to mention the R8's new look. It's very clearly an evolution of the first-gen's handsome styling. A strong grille and canted headlights, inspired by the TT and the concepts that came before it, highlight the front end, while Audi has opted to bisect the last-gen car's side blades with a body-color section of sheet metal. In back, slim taillights, exhausts that have been integrated into the rear bumper and a central diffuser are the main styling features. Opt for the V10 Plus, and you'll get a sizable rear wing, for added downforce. Take a look at our full gallery of live images from Geneva for a closer look at the new Audi R8.