• Feb 26th 2008 at 8:28PM
  • 69
Click above for a high-res gallery of the Audi TT 2.0 TDI quattro

After Audi unveiled the almighty R8 V12 TDI at the Detroit Auto Show, I asked the obvious question and they made it clear that they had no plans to build a production version. Now that the disappointment has subsided somewhat, Audi is offering up a consolation prize, although it's not known yet if the US market will get a crack at it. For the first time since the original TT debuted ten years ago, Audi will be offering a version with a diesel engine. A 170 hp, 258 lb-ft 2.0L TDI will be available in both the TT Coupe and Roadster. Putting the torque down through all four wheels by way of a six-speed manual gearbox, the coupe will run 0-62 mph in 7.5 sec, with the ragtop accomplishing the feat in 7.7sec. While by no means blistering speeds, the nature of diesel engine torque will mean that the TTs will feel quick everywhere. The real upside to all of this is the fuel economy of this claimed world's first diesel sports car. The lighter, more aerodynamic coupe will be capable of 44.3 mpg (US) while the convertible is just behind again at 42.7. Pretty impressive when gas prices as likely to go ever higher. The Audi press release is after the jump.

[Source: Audi]
Ingolstadt, 2008-02-27
The new Audi TT 2.0 TDI quattro:
Powerful performance with maximum efficiency

Audi is once again setting standards, this time with the new Audi TT and its TDI engine-a model that combines pure sportiness and powerful performance with sensational efficiency. The Audi TT 2.0 TDI Coupe quattro and Audi TT Roadster 2.0 TDI quattro are the first series-production sports cars to feature diesel engines. It's a compelling union:

The two-liter engine generates dynamic propulsion with 125 kW (170 hp) and 350 Nm (258.15 lb-ft) of torque, yet the TT Coupe and TT Roadster consume an average of only 5.3 liters and 5.5 liters of fuel per 100 km (44.38 mpg and 42.77 mpg) respectively-unparalleled in the sports car segment.

Audi is setting the pace with this synthesis of excellent dynamism and low fuel consumption, as it has done for many years: Since debuting in 1989 the TDI engines from the brand with the four rings have been paving the way for the world's most successful efficiency technology and acting as trendsetters for the entire automobile industry. Today, these powerful, refined and highly fuel-efficient engines represent a modern, smart take on sportiness. The run of victories achieved by the Audi R10 TDI diesel race car at the Le Mans 24 Hours and in the American Le Mans Series are impressive evidence of the tremendous potential of this technology.

The dynamic diesel engines from Audi exert an exciting impact not just in racing but also in series-production models-and now indeed in a sports car. The TT Coupe quattro with the 2.0 TDI sprints from zero to 100 km/h (62.14 mph) in 7.5 seconds and achieves a top speed of 226 km/h (140.43 mph). The Audi TT Roadster, likewise equipped with quattro permanent all-wheel drive, requires only an extra tenth of a second for the standard sprint, and continues up to a top speed of 223 km/h (138.57 mph). Both versions serve as outstanding examples of the success of the Audi efficiency strategy, thanks to their fuel efficiency ratings of 5.5 liters per 100 km (42.77 mpg), a figure that corresponds to CO2 emissions of only 145 grams/km.

Powerful, refined and efficient: The 2.0 TDI

The new four-cylinder TDI engine (engine displacement = 1,968 cc) represents a fresh take on the all-round compelling qualities of the TDI concept. Designers of the dual-camshaft, two-liter model looked to its predecessor-the most-produced diesel engine in the world-and expanded upon its major strengths: driving pleasure, efficiency and refinement.

The new common rail injection system is equipped with highly modern piezo injectors, whose eight-hole injection nozzles can perform up to five distinct injection sequences per cycle. This fine degree of modulation creates a modest pressure increase in the combustion chambers, resulting in a significantly reduced noise level. The system pressure of 1,800 bar allows fuel to form a fine dispersion, enabling precise, highly efficient combustion.

The turbocharger is also part of a new generation and operates with adjustable vanes that allow torque to build up rapidly. The positions of swirl flaps on the intake manifold are controlled by electric motors in order to adapt the flow of air to the current load and engine speed. The geometry of the engine's pistons has been modified, and the acoustics of the camshaft drive belt have been overhauled. Just as they did in the preceding model, two balancing shafts reduce the vibrations arising in the crankshaft drive.

The cumulative result of this progress is a high maximum engine speed of 5,000 rpm and, most importantly, improved thermodynamics in the combustion chambers. What this means is that the engine can run on up to 60 percent recycled exhaust that has been thoroughly cooled by the radiator. This results in a drastic reduction in untreated NOx emissions, with the 2.0 TDI already meeting the threshold values of the upcoming Euro 5 standard.

Dynamic road performance

The 2.0 TDI in the Audi TT Coupe and the Audi TT Roadster delivers 125 kW (170 hp) at 4,200 rpm and sends a full 350 Nm (258.15 lb-ft) of torque to the crankshaft at engine speeds between 1,750 and 2,500 rpm. Operating quietly and generating little in the way of vibration, this model delivers a hefty amount of power at the lowest rpm levels and is highly responsive to input from the gas pedal. Its supreme power development lends this engine its own unique, fascinating character-that of a muscular, smart sports engine.

The Audi TT Coupe 2.0 TDI quattro easily leaves the gasoline-powered competition behind when accelerating from a standstill. It sprints from zero to 100 km/h (62.14 mph) in just 7.5 seconds and never looks back until it reaches 226 km/h (140.43 mph). The TT Roadster accelerates to 100 km/h (62.14 mph) in 7.7 seconds and keeps going up to 223 km/h (138.57 mph).

These models-the world's first diesel sports cars-consume an average of only 5.3 liters and 5.5 liters of fuel per 100 km (44.38 mpg and 42.77 mpg) respectively, which corresponds to CO2 emissions of a mere 140 g/km and 145 g/km. In so doing, they are setting a benchmark that represents a veritable quantum leap in the sports car segment. With the TDI engine in the TT series, Audi once again establishes its leading role on the diesel market. The brand with the four rings is advancing progress and starting at the top.

In keeping with the theme of sporty performance, Audi has combined its two diesel-engine sports cars with highly effective manual six-speed transmissions whose short lever travel allows the driver to shift quickly, easily and precisely. The housings for these transmissions are made of lightweight, high-tech magnesium materials. Relatively long final transmission ratios have been employed to bring the drivetrain in line with the character of the TDI engine.

In light of their high torque values, Audi is equipping both of its new TT models with quattro permanent all-wheel drive. The heart of this system is an electronically controlled, hydraulically activated multi-plate clutch, which is located in the rear of the vehicle for improved weight distribution. This clutch generally distributes up to 85 percent of the engine power to the front axle and 15 percent to the rear axle; in extreme situations it can divert up to 100 percent of the power to either axle.

The overall concept: An exercise in uncompromised sportiness

Consistent efforts to reduce vehicle weight are also part of the efficiency strategy pursued by the brand with the four rings. Both sports cars are very lightweight: the 2 + 2-seater TT Coupe weighs only about 1,370 kilograms (3020.33 lbs) when empty, while the two-seater TT Roadster with soft top weighs roughly 1,415 kilograms (3119.54 lbs). Underlying these low weights is an innovative hybrid body construction developed by Audi. Front components are made of aluminum and utilize Space Frame technology; rear components are made of steel. This solution guarantees that the frame is as rigid as possible and optimizes load distribution between the axles.

The Audi TT Coupe and TT Roadster are dynamic, emotion-packed sports cars. As was the case with preceding models, these cars are impressive for their powerful design, whose dynamic flow continues on into the interior. The cockpit contains multiple nods to the circle motif, and the sports steering wheel with its flat-bottomed rim fits the driver's hand like a glove. The sport seats are deep-set, providing a sporty seated position and firm lateral support. The backs of both rear seats fold down in the TT Coupe, making the trunk space grow from 290 to 700 cubic liters (10.24 – 24.72 cubic ft). The Roadster (250 liters, 8.83 cubic ft) comes with a practical load-through hatch upon request.

The sports suspension likewise offers extraordinarily dynamic features. The front suspension is pivoted on an aluminum subframe and has a wide track measuring 1,572 millimeters (61.89 inches).

A highly precise rack-and-pinion steering system with a direct steering ratio provides an intimate link between the driver and the road. Power steering with servo assist, which decreases as speed increases, is generated by an electromechanical drive that is even more efficient than a hydraulic pump.

The coil springs and shock absorbers in the four-link rear axle are situated in separate areas. The links are also finely differentiated: The layout of the trailing links, which absorb the propulsive and braking forces, is relatively soft to promote a comfortable ride. The connections to the three transverse links per wheel, on the other hand, are rigid in order to direct transverse forces into the body with precision.

The Audi TT Coupe 2.0 TDI quattro and Audi TT Roadster 2.0 TDI quattro roll on 16-inch, cast aluminum wheels fitted with 255/55 R16 tires. Behind the wheels are large disk brakes with pads that develop large coefficients of friction. The ESP stabilization program supports the neutral to slight understeering feel of the TT-the finishing touch on an overall portrait of exciting dynamics, exhilarating driving pleasure and stability you can count on.

Audi magnetic ride, a high-tech shock-absorber system available as an option, is an adaptive system that resolves the traditional conflict of interests between comfort and handling. A magneto-rheological fluid circulating in the shock absorbers changes the direction of the magnetic particles within milliseconds when electricity is applied; this alters the overall characteristics of the fluid and, in turn, modifies the damping characteristic. The driver can choose between "Normal" and "Sport" programs by flipping a switch.

Equipment makes a statement of refined style

Standard equipment for both of the new TT models reflects the sporty character and refined style of the series. Faux aluminum accents add a shine to gray inlays and various other components in the interior. The sports steering wheel comes with a Nappa leather cover. The climate control system (standard for the TT Coupe) regulates heating and ventilation in response to the level of sunlight. The driver information system and chorus audio system round out the standard equipment.

A wide array of high-tech equipment is available as options, including a highly modern generation of audio devices, electrically adjustable front seats, the adaptive light dynamic cornering light system and two navigation systems with a user interface based on the Audi MMI concept-a cut above the competition.

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    • 1 Second Ago
      • 7 Years Ago
      the "diesel gas premium" many quote is pretty pointless as everyone always quotes regular gas .

      first off, diesel generally at least in california costs about the same as premium. it varies a bit more as not every station has it. that said, sometimes it costs the same as regular, sometimes about the same as plus "89" and sometimes like right now 10 cent smore than premium in some towns (it varies during the year).

      that said you cant compare it to regular, with this particular car. pretty much every car that is german that even has a diesel or diesel equivalent possibly coming runs on premium.

      its all mercedes , vws , bmws, and maybe the acuratsx/honda accord diesel.

      the tsx takes premium, and all bmws , audis and mercs do. this TT for example the 2.0 T takes premium. so the per gallon premium at most during the year, at least in my observation is 10 cents more than premium, and at times of the year and depending on where you live it could actually cost 15-20cents less than premium and cost the same as regular.
        • 7 Years Ago
        You may find this shocking, but most Americans don't own German cars, especially if you remove VW, who DOES make cars that have 87 octane recommended.

        Doing the math to explain why one car is financially similar to another car that most Americans find too expensive to kinda of odd.
      • 7 Years Ago

      Really, really hope Audi brings this car to the US!
      • 7 Years Ago
      don't any of you have day jobs?
      • 7 Years Ago
      Diesels and Hybrids are good for different reasons...

      If you're a highway driver, diesel is the way to go... and for the city, the Prius is better.

      These diesels, according to a lot of owners, end up getting better mileage than the estimate on the window.

      This same engine that will be coming in the Jetta later this year detuned to 140 hp is rated at mid 50's mpg on the highway according to the vw site:

      "Fuel Efficient Available 2.0L TDI® Clean Diesel offers mid-50s MPG on the highway*, yet it meets some of the strictest environmental standards on the planet. Something to think about during those long pauses between fill-ups. *EPA estimates. Your mileage may vary. "

      The sedan or sportwagen will be my new car later this year!
      • 7 Years Ago
      correct me if im wrong, but why would i want to buy a cramped, slow sports car? yea it looks the look but it wouldnt be as satisfying to drive. wouldnt this engine application be far more practical in an A4? im all about diesels too, dont get me wrong, but it doesnt make sense in this particular model. and dont think im biased bc id choose this over the comparable german coupes anyway.
      • 7 Years Ago
      if we as americans were serious about getting max MPG's at all... we would have been using direct injected diesel a long time ago and invested in its "clean" use.

      The prius? all this green car BS is marketing to appeal to the young green hippies that want to "feel good" about doing their part. For the money they pay and the return they would get - diesel or bio diesel would be so much better.

      People crapped themselves here in the US when gas hit $3/gallon. I would say we will have to see near double that to get anyone to actually pay attention and do something about diesel/hybrid tech. The simple fact is nobody cares right now. Every time I see someone driving a prius I think "ignorant douche". The $30,000 they paid for it could have been used to buy a 15,000 super efficient car, and then donate the other 15,000 to some save the planet foundation to clean up forests or something. I don't know.

      Even if we really did want hybrids - if you want to REALLY get down to the nuts and bolts of being efficient, start taking out the pointless creature comforts that widdle away at MPGs: Power seats, leather, custom audio systems, sound dampenings... this all adds weight and weighs is not equal to MPGs. All I'm saying is that you can't have your cake and eat it too at this point. If you want the right to bitch at others who arent "Green" then lead by example, not by words.
        • 7 Years Ago
        My Uncle have averaged about 45-50 MPG over the life of his 2005 Prius (driving normally and not like a grandma). He paid 22,000 for it. Priuses also have SIGNIFICANTLY less emissions than any other vehicle on the road. Although I would never buy one, I must say you're completely wrong. What planet are you from?
        • 7 Years Ago
        Priuses don't cost $30,000.

        A Prius is cheaper than this car. It produces MUCH fewer trace emissions (NOx) and it produces fewer primary emissions (CO2).

        It also uses at least 15% less oil than this thing, because Diesel takes more oil to make than gas.

        I understand that not everyone wants a Prius, but I cannot understand the hate for it. Different cars for different people.
        • 7 Years Ago
        "Feel good." I hate that phrase. The Prius gets 45 MPG real world; you're damn right I'd feel good getting over twice the mileage of the average American's new car.

        Base price is $20,950.

        Plus, the "they could have bought a Corolla" argument is simply unrealistic. Given the Prius' demographics, it's more likely the alternatives were a 5-Series or E-Class. Yes, it's possible to get within 10 MPG of a Prius with a Corolla or Yaris, but then you'd be driving rolling oatmeal: an anonymous vehicle and an unmemorable driving/owning experience. No one asks Corvette buyers why they didn't save $40K and buy a Cobalt.
          • 7 Years Ago
          PJ, you just contradicted yourself. You said you hate the "feel good" term. If the average Prius buyer is coming from the 5 and E class market, the only reason they are coming is to relieve their guilt of their huge carbon footprint. It makes them feel good, and look good, like their saving the world. They don't need the fuel savings to scrape by.

          If you just want an economical commuter car, at the Toyota store I work for, the cheapest Prius is $23909 MSRP - buy for $22445 (invoice.) They're package 2's. A new 2009 LE Auto Corolla is $17659 MSRP - buy for $16021 (less than invoice.) That's a $6500 difference, or $125 a month on a buy.

          If you use your figure of 45MPG for the Prius and my experience of 32 MPG for the Corolla, you will save about $27 in gas per 1000 miles driven. That's using $3.00 a gallon gas. So if you drive about 5000 miles a month, the two should be pretty equal in monthly cost. Most distance commuters aren't close to that number, however.

          For resale, average black book for an 05 Corolla LE is $9300, and an 05 Prius is $15100. So you should retain most of the cost difference when you get out of it. Many people get sketchy on high mileage Prius', because their afraid they might have to replace the batteries in 6 months. This leads to a smaller difference between the two when the miles get close to 100,000.
        • 7 Years Ago
        @Jeff Johnson
        Believe it or not some people who own Prius' arent douches trying to make a political statement. While I agree that super efficient econoboxes serve their purpose some people need a car with more capabilities. A family member owns a Prius and gets 53 mpg out of it, she saves $600 a month over her previous SUV in gas alone while using nav, bluetooth and other things econoboxes dont offer. BY the way having driven it, you couldnt pay me to be seen inside of one.
        • 7 Years Ago
        come on.."all this green car bs " in many cases boils down to normal people psyched to get 50 mpg and proud they don't have to drive some 15 mpg dinosaur
      • 7 Years Ago
      This diesel discussion is getting old, but it will still probably hit 100 comments, most of them by that dondonel guy... The flame with which he is bashing diesels is astonishing, almost rivaling his passion that the EPA cycle is better than the european, mostly because companies put some random numbers in mpg... And all this from a bad experience with a golf tdi 1.9 matk IV. Unfortunately there are some facts that speak in favor of diesel, as far as economy is concerned. The lean mixture, higher compression, higher thermal efficiency are all there, even if you factor in the higher fuel content, it is still is more efficient, BUT, and tahts a big BUT, only under light-medium loads. At full throttle, the gasoline engine has minimum loss etc. So it pretty much depends on how you drive. There is proof out there, TDIclub is a great place, AUDI tdi and Peugeot HDI LeMans racers are proofs that the diesel is more economic. And also the one that is probably least credible, but most fun, is the 4.2 TDI audi A8 that was on Top Gear. 40 mpg average from this engine, with that torque and that weight is unlikely to be achieved soon by a gasoline engine of similar power. Even without the aircon, lights etc. There are skeptics, i am a believer, as i have witnessed myself great mileage from a 2.0 tdi with 140 bhp. And if you don't exploit the amaizing low end torque, before the turbo kicks in, and try to revv it up till 4000 rpm and then shft, all the efficiency is gone. Although the bmw 535d got 12 mpg imperial on top gear, it was still on a track with constant acceleration and braking. Man thats a ling and useless post...
      • 7 Years Ago
      Audi - how about the new A4 Avant with this engine geting ~40+mpg
      • 7 Years Ago
      I don't get why americans don't embrace the diesels, I mean if there is something you americans love, it's torque? On the other hand, the only great diesel powertrains have only been sitting in BMW's for the past three years or so...
        • 7 Years Ago
        The torque doesn't reach the ground, as evidenced by the 0-60 times.

        They're fine when just tooling around, but when pushed, well, it's a 170HP car.
        • 7 Years Ago
        @ MixiM,

        Despite the education that most Americans get, many foolishly go against what they were they were taught and would rather have someone tell them what's good, what's right, what should happen, instead of doing the research on their own. Throw in some slick advertising and sound bites and suddenly they are Pavlov's Dog.

        And yes, this is coming from a fellow American. Sometimes, people just stop thinking for themselves here.

        Having said that, who's leg do I have to hump to get that car here!?

        (I won't touch your comment on BMW diesels. I'm not knocking them. It's just not worth debating.)
        • 7 Years Ago
        "I don't get why americans don't embrace the diesels"

        Uh, maybe because we can't buy any?
        • 7 Years Ago

        Americans don't buy diesels because they have no reason to:

        1. diesels are not more fuel efficient than gasoline engines giving the same performance (installed in passenger cars); remember that you have to convert fuel consumption into pounds (or kg) before comparing the efficiency of engines that use different types of fuels

        2. diesel fuel is not cheaper than gasoline in US; in Europe diesel is cheaper because it is taxed less; in US you can't even pay the difference in price between diesel and gasoline engine from the fuel bills in the usual 36 month lease term, diesel buyers only lose money
          • 7 Years Ago
          don't spread misinformation dondonel....yes, diesel is more efficient. Read and learn a bit about the difference between otto and diesel combustion cycles to find out why.
        • 7 Years Ago
        Sometimes I think there is a strange conspiracy to keep Americans away from efficient vehicles and hooked on oil. :) More seriously, judging from the premiums the TDI VW's used to go for, I think there is a desire for diesels in the US. It's just the stringent emission requirements, especially in California, the largest US market, that made it impractical for the automobile makers. In addition, I'm sure many drivers feel a little bit nervous about purchasing a diesel, because diesel pumps are not nearly as plentiful as gasoline pumps. The US may not have the infrastructure it needs to handle a large number of diesel vehicles, which means that the cost of diesel may go up enough to void the fuel economy advantage.
        • 7 Years Ago
        so...an Audi TT that's slower than my wife's Grand Am? unless it's under $20k i think i'll pass.
        • 7 Years Ago
        Or maybe it's not because everyone but you is a robot.

        Maybe it's because it doesn't make financial sense? It doesn't make financial sense, it doesn't really make environmental sense, and it doesn't reduce our dependency on oil significantly either.

        In the cases where it does make financial sense, heavily used vehicles esp. high-consumption vehicles like certain trucks, Diesel is quite well accepted in the US.

        It has been difficult to sell Americans on efficient vehicles in general. Why? Because most Americans don't have a lot of problem affording driving inefficient vehicles. These high-mpg Diesels have little advantage over similar gas cars (improved driveability at low RPMs being a notable exception). It's just that these high-mpg gas cars aren't made for the US market. There was never a 170HP TT made for the US, let alone one with the higher pressure tires and taller rear end necessary to keep fuel mileage up.

        If Audi is successful in bringing the economical car back from only the cheapest econobox corner of the US market, more power to them. But I think there's plenty of engine solutions that could be offered there, and many of them will be a lot more affordable to buy than a direct-injected turbocharged Diesel.
      • 7 Years Ago
      Great styling of TT + decent vehicle dynamics + high mileage, torquey engine = no brainer. Just do it, Audi!
      But whoa, whoa, whoa -- it can't be more than $40K. The gas TT is more expensive than it needs to be -- make the diesel the same or a bit cheaper. I think people would balk at this at $40K or above.
      • 7 Years Ago
      "While by no means blistering speeds, the nature of diesel engine torque will mean that the TTs will feel quick everywhere."

      No, it means the TT will feel quick when you drive it like a laid back family car. And it will fall flat on its asthmatic face when you drive it like a sports car.

      Maybe they should stop and think about how a $45,000 roadster is driven.

      • 7 Years Ago
      Even though the TT is front heavy.
      you can stick wide summer tires on it, and it still brakes, corners, and accelerates.
      and the double clutch transmission (with launch control) makes the most of the power

      Seeing as all my grades of gasoline have 10% ethanol, the difference in energy between diesel and gas is about 15% now.
      If you own a diesel vehicle, you have to factor in the lower diesel prices from the summer and see if that balances out the higher prices in winter.
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