Garage Kept 2007 Audi A4 2.0t Sedan 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.

These are your top 10 worst-selling vehicles of 2012

Despite 2012 being the best year of auto sales this country has seen since 2007, not every vehicle got an equally large share of the sales pie. Some barely got a sliver, as evidenced by this year's list of the top 10 worst-selling vehicles of 2012. We've dug through sales data from every automaker to come up with this year's list and, like last year, we've set some parameters to ensure it includes legitimately bad-selling vehicles. The first parameter is a starting MSRP under $100,000, which automatically excludes what's parked in most one-percenters' garages. We're also excluding vehicles cancelled in 2012, even if they garnered sales through the end of the year while dealerships sold off remaining inventory. This includes models like the Mitsubishi Eclipse, Mercedes-Benz R-Class and last year's worst-seller, the Acura RL. Next, vehicles are considered as they are reported by the automaker, which means that, while sales of the Murano CrossCabriolet were probably low enough to make the list, because Nissan reports only one number for all Murano sales, it was excluded. Cadillac, however, reports sales of the Escalade EXT separately from the Escalade, hence its repeat appearance. Finally, there was the question of whether or not eligibility should be given to Suzuki vehicles, as the brand announced in November that it would end sales in the US as soon as its current inventory ran out. We decided Suzuki vehicles should be included as the brand was offering 2013 models at the time of the announcement, and as far as we can tell, inventory levels remained high enough to satisfy demand through the end of the year. Without further ado, below are the top 10 worst-selling vehicles of 2012. Top 10 Worst-Selling Vehicles of 2012 10. Volvo C30 MSRP: $25,500 Units Sold: 2,827 Last Year: – 9. BMW Z4 MSRP: $47,350 Units Sold: 2,751 Last Year: – 8. Audi TT MSRP: $39,545 Units Sold: 2,226 Last Year: – 7. Subaru Tribeca MSRP: $32,595 Units Sold: 2,075 Last Year: 10 6. Suzuki Equator MSRP: $19,449 Units Sold: 1,966 Last Year: 7 5. Cadillac Escalade EXT MSRP: $63,060 Units Sold: 1,934 Last Year: 6 4. Nissan GT-R MSRP: $96,820 Units Sold: 1,188 Last Year: – 3. Acura ZDX MSRP: $50,920 Units Sold: 775 Last Year: 4 2. Mitsubishi Lancer Sportback MSRP: $18,495 Units Sold: 702 Last Year: 3 1. Mitsubishi i-MiEV MSRP: $29,125 Units Sold: 588 Last Year: – Want a little more "worst-selling" data? Check out our list of the top 10 worst-selling vehicles of 2011.

2017 Audi S4 Avant is what forbidden fruit looks like

Take a good look at this lemon yellow Audi S4 Avant at the Geneva Motor Show, because you're not going to see one on the road in the US. That's really a shame, too, because for a family that wants to combine performance and utility, this seems like a great package. The S4 Avant takes the wonderful aspects from the latest S4 Sedan and adds just a little more to sweeten the deal. Drivers still get a turbocharged V6 and eight-speed transmission. Plus, Audi's famous all-wheel drive system and torque vectoring provide tons of traction whether motoring through a snow storm or taking a corner. In addition, customers get up to a massive 53.3 cubic feet of cargo space in the wagon, versus 17 cubic feet in the sedan. The only downside of the extra room is that the 0-62 sprint takes 4.9 seconds in the long roof versus the 4.7 seconds of the sedan. We'd take that trade-off. The Avant even looks better. Neither version is ugly, but the longer roof flows beautifully to the raked rear hatch. The result looks more elegant than the four-door. Unfortunately, these advantages simply add to the S4 Avant's status as very sweet forbidden fruit. American tastes might turn from crossovers to wagons someday, but until that unlikely prospect happens, enjoy these great shots of an enviable vehicle. Related Video: From 0 to 100 km/h (62.1 mph) in 4.7 seconds with fuel consumption of less than 7.4 liters of fuel per 100 km (31.8 US mpg) – the new Audi S4* and the new Audi S4 Avant* are advancing to the peak of the competitive field with strong performance and exemplary efficiency. Its newly developed turbo V6 engine outputs 260 kW (354 hp). New solutions in networking and assistance systems round out its features. Audi is transferring many technologies from the full-size class into the mid-size class. Lightweight and strong: the 3.0 TFSI The strong heart of the two new S models from Audi is a newly conceptualized 3.0 TFSI engine. The direct gasoline injection engine with turbocharging has an output of 260 kW (354 hp) and produces a hefty torque of 500 Nm (368.8 lb-ft) from 1,370 to 4,500 rpm. In terms of power and torque, it surpasses the previous model while achieving considerably lower figures in weight and fuel consumption. The turbo V6 engine accelerates the Audi S4 from 0 to 100 km/h (62.1 mph) in 4.7 seconds, and on up to an electronically governed top speed of 250 km/h (155.3 mph). The standard sprint takes two tenths of a second longer in the S4 Avant.