2009 Audi Q7 Premium Sport Utility 4-door 3.6l 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.

2015 Audi A3

What kind of watch do you wear?
Especially today, when wearing a wristwatch is practically obviated by the near-ubiquitous use of cellphones, the timepiece found on one's arm makes a statement about how people perceive themselves.
A sport watch from Nike or Garmin would seem to indicate enthusiasm for athletic pursuit. Inexpensive fashion statements from Nixon or Nooka could signify a love of high design. Splashing out on a true luxury timepiece from Rolex, Bell & Ross or Breitling serves as a sort of human plumage display to connote, "I have thousands of dollars - at least - of disposable income."

The 2017 Audi R8 Spyder starts at $176,350

Audi just revealed pricing info for the R8 Spyder, which will start at $176,350, about a year after revealing pricing information for the coupe ( which starts at $164,150 in base form; the Plus starts at $191,150). In case you haven't had your coffee yet, like-equipped base cars will span a $12,000 gulf. But the 2017 R8 Spyder costs about the same as the outgoing R8 Spyder V10 equipped with an automatic (which was at the time a very expensive option), so consider that minimal price inflation. The more interesting comparison is with its platform-mate, the Lamborghini Huracan. A drop-top version of the Italian supercar starts at $267,545 in similar AWD trim with a 5.2-liter V10. Now, it is true that the Huracan Spyder makes 602 horsepower, a 62 horsepower advantage over the standard R8 Spyder with the same engine (540 hp if you are bad at math). The Lambo also a tenth faster to 60 mph than the R8 Spyder, at 3.4 seconds. (The '17 R8 Spyder is itself a tenth quicker than its predecessor, so there's that.) But, the R8 V10 Plus makes 610 hp. We're waiting to hear back form Audi on pricing for that Spyder model. In the coupe, it's a $27,000 increase over the base R8 V10. That logic would peg an R8 Spyder V10 Plus at around $203,000, or $64k less than the Huracan. In either case, you're paying a lot for Lamborghini's unique styling and tuning, although it's hard to put a price on the specialness of driving a Lamborghini. The Huracan Spyder never for a moment lets you forget you're in something fast and Italian. That being said, both are legitimate supercars. The R8 Spyder was developed alongside its Italian cousin, and features an appropriately large amount of aluminum and carbon fiber materials in its construction. Of course, like its coupe counterpart, there's no manual available for the new R8 Spyder. That died with the previous generation. The good news, for fans of open-air driving, is that the roof mechanism only adds 97 lbs to the weight of the car, and Audi kept the electrohydraulics that actuate it as low as possible. If it's anything like the Coupe to drive, and you can be sure since it's an Audi there won't be much trade-off for the open roof, it'll have a dual personality that will accommodate both daily driving and occasional track use. Sounds like a deal, huh? Related Video: Audi Convertible Luxury Performance Supercars r8 spyder r8 huracan