Audi is celebrating the 2013 Wörthersee Tour with a special concept version of the company's TT. The Audi TT Ultra Quattro concept tips the scales at just 2,449 pounds thanks to some extensive engineering work. The company pulled nearly 95 lbs from the car's body structure and used carbon-fiber reinforced plastics for many of its detachable body components. As a result, the concept weighs in at a full 220 pounds lighter than its production counterpart. Throw in a wicked turbocharged 2.0-liter four-cylinder engine with 310 horsepower and 295 pound-feet of torque, and you get a machine with the power to weight ratio in the supercar realm. 0-60 comes up in 4.2 seconds and top speed is listed at 173 mph.

Inside, the TT Ultra Quattro features plenty of carbon fiber trim, and designers also fitted the seats from the R8 GT to save a little weight. The buckets use CFRP for the seat frames, saving nearly 50 pounds in the process. In a world where automakers seem blind to the negative effect of throwing more heft at a vehicle, we're in love with the Ultra Quattro concept. Check out the full press release below for more information.
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AUDI TT ULTRA QUATTRO CONCEPT SHEDS 300KG TO SHARPEN ITS FOCUS

TT ultra quattro concept destined for the Worthersee festival sheds 300kg (compared with closest equivalent production model) and benefits from a power boost for its 2.0-litre TFSI engine

310PS, 400Nm between 1,900rpm and 5,000rpm
1,111kg weight yields 279PS per ton, 0-62mph in 4.2 seconds, 173mph top speed
Extensive use of Carbon Fibre-Reinforced Polymer (CFRP), Fibreglass-Reinforced Polymer (FRP) and magnesium reduces bodyshell weight by 100kg

Audi engineers are waging war on excess weight, and their latest victory is a TT 2.0 TFSI Coupe which has shed an incredible 300kg and gained a power upgrade to 310PS, giving it a 4.2-second 0-62mph sprint time and a top speed of over 170mph.

The TT ultra quattro concept is, as its name suggests, essentially a study developed for next month's annual gathering of Audi enthusiasts in Wörthersee, Germany, but it demonstrates how an intelligent mix of materials can bring about considerable weight savings even in existing series-production models. Work on the deployment of these materials could conceivably inform the development of future low-volume Audi model series.

The showcar tips the scales at a lean 1,111kg, an impressive achievement considering it combines its potent petrol engine with quattro all-wheel-drive. With 310PS and 400Nm of torque to propel this pared back mass via a six-speed transmission, the result is a highly impressive power-to-weight ratio of 279PS per ton, a blistering 4.2-second 0-62mph acceleration time and a top speed of 173mph.

The four-cylinder engine raises its game thanks to modifications to the crankcase, the crankshaft, the balancer shafts, the flywheel, the sump, the bolts and certain ancillary units that help to reduce the unit's weight by 25 kilograms.

No detail was too small to escape scrutiny during the optimisation process that culminated in the TT ultra quattro concept. With its innovative hybrid body shell the fully fledged production TT already boasts a low body weight of 206 kilograms (excluding detachable body parts amounting to 98 kilograms) which bears testament to Audi engineers' desire to account for every last gram.

The concept's body structure sheds another 43 kilograms, and with the help of optimised detachable body parts achieves a total weight saving of 100 kilograms.

The use of carbon fibre-reinforced polymer (CFRP) in the rear end, the centre tunnel, the B-pillars and the roof contributes to this significant saving, as do magnesium components in the floor and in the hinge reinforcements.

The front brakes with their ceramic discs and aluminium fixed calipers also make a contribution, and there are savings to be found in the titanium exhaust system with its single centrally mounted tailpipe and the CFRP wheels with their high-strength aluminium spokes, which shave off a particularly impressive 20 kilograms.

Fibreglass-Reinforced Polymer (FRP) springs
Fibreglass-reinforced polymer (FRP) also replaces more conventional steel for the coil springs in the suspension, helping to further reduce unsprung masses. The core of the all-new springs consists of long glass fibres twisted together and impregnated with epoxy resin. A machine wraps additional fibres around this core, which is only a few millimetres in diameter, at alternating angles of plus and minus 45 degrees to the longitudinal axis. These layers support each other and act in either compression or tension. The use of FRP at this point cuts weight by 40 per cent while still permitting good operating characteristics.

To further hone the nimble handling which is already a TT trademark, the developers have also concentrated on distributing the remaining weight as effectively as possible by moving it to the centre of the car wherever it was practical to do so. The lithium-ion starter battery, for instance, is located in the interior under the driver's seat. It is much smaller than a lead battery and weighs just under four kilograms (8.82 lb).

300kg total weight saving
Overall, these lightweight construction measures leave the concept car 300 kilograms lighter than the comparable series-production car, helping to minimise the inertial mass that the TFSI engine has to contend with during acceleration.

The exceptional calibre of the TT ultra quattro concept is reflected in its even more emphatic styling, the focal point of which is the large spoiler which gives a nod to its motorsport genes. The base of the rear wing is manufactured as a supporting component from milled aluminium, while the wing itself is made of visible carbon fibre.

The concept car is painted in the special colour crystal white, which is complemented by CFRP elements in the roof, the flanks and the tailgate. In the interior the same material also adorns the door trim, the centre console and the cross-bracing that replaces the rear seat bench. The standard front seats are also replaced by fibreglass-reinforced polymer (FRP) bucket seats from the R8 GT which help to reduce the all-up weight by a further 22 kilograms.

There are no compromises on equipment behind the headline-grabbing figures - air conditioning, electric window controls and an electromechanical parking brake are all included, and there are even innovations such as compact cameras in the doors which replace the exterior mirrors and transfer images directly into the digital cockpit.


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  • 33 Comments
      The Gaphreez
      • 1 Year Ago
      Pretty sure 300 kg is closer to 660 lbs than 220 lbs.....
      turbomonkey2k
      • 1 Year Ago
      No way this goes on sale and even if it does it will cost almost as much as an R8. Still, I'm impressed with the end result. That's a crazy low weight... especially with all wheel drive.
      KCyclone
      • 1 Year Ago
      220 lbs lighter huh Autoblog? That darn reading the press release and basic mathematics are tough these days.
      ferps
      • 1 Year Ago
      This is the future of sports cars. The best ones will be known for the light weight rather than the size of their engine.
      wonky donky.
      • 1 Year Ago
      Now if the VAG could just make a car without a cast-iron block. Even a base Honda has aluminum.
        Christopher Anderson
        @wonky donky.
        Cast-iron blocks are stronger for boost though. Since VW motors are designed for boost, and can get to 400+ hp for not much money, I'll take the weight penalty.
          Xedicon
          • 1 Year Ago
          @Christopher Anderson
          Yup. Even the old 420A used in the Neon could run 500+ hp because iron block. Granted that took some internals work - bone stock internals only got you to about 330hp... I knew a guy who found that out the hard way lol! Even so 300-330 when starting from roughly 135 ain't bad.
        • 1 Year Ago
        @wonky donky.
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          • 1 Year Ago
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      Drakkon
      • 1 Year Ago
      Dotted line? I'll sign. RS engine and we're really talking.
      trx0x
      • 1 Year Ago
      i guess Audi also saved weight by eliminating door handles…
      Julio Arreaga
      • 1 Year Ago
      damn, came here to point out incorrect weight-loss.. but all you guys beat me to it lol good job everyone.
      • 1 Year Ago
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        KCyclone
        • 1 Year Ago
        Carguy: I don't disagree that the TT isn't really a drivers car, but these exercises are great for working with more expensive and lighter weight materials. It isn't like this would go into production at the end of the life for this generation anyway. Also, at this power to weight, I am betting this would be a great drive, at least I'd love to get the chance to find out.
      knightrider_6
      • 1 Year Ago
      so it's a souped up Beetle? not that I expect anything more from Audi.
        acuraec
        • 1 Year Ago
        @knightrider_6
        your an ignorant d-bag! you obviously do not drive audi's. these things handle better then 99% of car made. souped up beetle? hahah. you need to learn and do some research before you write jr.
        Drakkon
        • 1 Year Ago
        @knightrider_6
        wah-wah-waaaaah Hey, it's your Knightrider a souped up IROC?
      foxtrot685
      • 1 Year Ago
      \" In a world where automakers seem blind to the negative effect of throwing more heft at a vehicle...\" I dissagree with this statement. In a world where the MPG race is the on the frontline for nearly every auto manufacturer, automakers are seeking ways to make cars lighter while increasing structural rigidity. It seems every new generation of a car is lighter and stronger than the car it replaces.
        imag
        • 1 Year Ago
        @foxtrot685
        Absolutely agree. That was a ridiculous statement by Zach.
        SatinSheetMetal
        • 1 Year Ago
        @foxtrot685
        In a world where the F-type is heavier than the porsche 911...
      PatrickH
      • 1 Year Ago
      Do you guys ever check your math? I swear this is a weekly occurance...
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