• Jun 27th 2008 at 2:01PM
  • 37
Audi has finally confirmed all the details on its new range-topping supercharged V6, and the final output figures are in line with previous reports. The 3.0-liter TFSI engine (although the "T" is a misnomer since it used to stand for "turbo") is putting out 290 hp and 310 lb.-ft. of torque, with maximum twist beginning at an incredibly tractable 2,500 RPM. The blown six's thrust should be linear considering the belt-driven design, and Audi maintains that it will consistently outperform its biturbo predecessors. Although Audi has yet to confirm what models the supercharged, direct-injected mill will be fitted to initially, it's a safe bet that it will find a happy home within the new A6 and the next S4. Check the press release after the jump for all the details.


The new 3.0 TFSI:
Hi-tech V6 with compressor supercharging

  • Compressor and direct injection – a compelling duo
  • 213 kW (290 hp), 420 Nm and outstanding efficiency
  • Superb power from idle speeds up, spontaneous torque buildup

Powerful, spontaneous and ultra-efficient: this is the new top version in Audi's V6 engine range. The 3.0 TFSI develops 213 kW (290 hp) and a huge 420 Nm (309.78 lb-ft) of torque. It combines two state-of-the-art technologies in perfect style – gasoline direct injection and compressor supercharging. The hi-tech V6 will go into production later in the year.

The brand with the four rings has a long tradition of supercharged engines. The legendary Grand Prix racing cars built by Auto Union back in the 1930s already featured compressors, which coaxed as much as 440 kW (around 600 hp) out of the mighty 16-cylinder and 12-cylinder engines. From the late 1970s on, Audi focused its attention on the exhaust turbocharger, which helped it to a succession of noteworthy triumphs in the world of motor sport. It was at this time that Audi's turbo engines began to enjoy resounding market success.

The compressor is now staging a comeback. It is the ideal supercharging technology for the new three-liter V6, the 3.0 TFSI; the T in Audi engine designations consequently no longer exclusively denotes turbo versions.

Extensive comparative tests revealed the mechanical supercharger to be superior to a biturbo concept for this engine. In conjunction with direct injection, its packaging, starting performance and dynamic response were far superior.

The compressor is so compact that it easily fits inside the 90-degree V of the cylinder banks, in place of the intake manifold. Because it is driven by the engine via poly-V belt, its full thrust is available from idle speed upwards, producing huge pulling power when driving off. The 3.0 TFSI delivers its maximum 420 Nm (309.78 lb-ft) at only 2,500 rpm and maintains this constantly until 4,850 rpm.

The gas paths after the compressor are very short; this means that the torque is built up extremely quickly, even more dynamically than on a naturally aspirated engine of the same displacement. The 3.0 TFSI responds sportily to the throttle, with exceptional agility and bite. And it revs up to the maximum of 6,500 rpm with playful ease, achieving its rated output of 213 kW (290 hp) at just under 5,000 rpm.

Top marks for fuel efficiency

The 3.0 TFSI without question earns top marks for fuel efficiency, too. And its pulling power enables it to extend the transmission ratio, further adding to its already superior efficiency. The new 3.0 TFSI will achieve an average fuel consumption of well under 10 liters per 100 km (23.52 US mpg) in virtually all longitudinally engined Audi models, the concept for which it is envisaged. It is designed to run on either premium or regular gasoline and already complies with the future emission standard Euro 5 – a question of honor for every new Audi engine.

The Audi technology of gasoline direct injection according to the FSI principle was what made this trailblazing efficiency possible in the first place. Unlike conventional concepts, it allows the compressor to be located behind the throttle valve. In view of the low density of the intake air at loads below supercharging level and when coasting, its rotors are free-running and the amount of power required to drive them is low.

The engine's high compression ratio of 10.5:1 also plays a big part in its efficiency. The direct injection principle is once again the key, because the intensively swirled fuel cools the combustion chamber, reducing the tendency to knock.

The compressor of the new 3.0 TFSI is what is known as a Roots blower. Inside it, two four-vane rotary pistons counter-rotate at a speed of up to 23,000 rpm, with an air gap between them measuring just a few thousandths of a millimeter. The rotors can deliver 1,000 kilograms (2204.62 lb) of air per hour and force it into the combustion chambers at a boost pressure of up to 0.8 bar.

Two water-to-air intercoolers made from aluminum and connected to a separate coolant circuit are integrated into the housing. Here, the compressed and therefore heated intake air is cooled down again in order to boost its oxygen content for the combustion process. An extensive package of measures reduces the level of noise generated by the compressor to a minimum.

The engine itself belongs to Audi's family of ultramodern V engines. In addition to the standard cylinder angle of 90 degrees, their attributes include systematic lightweight construction – the three-liter version's crankcase, which is made from cast aluminum/silicon, tips the scales at just 33 kilograms (72.75 lb). The entire engine, including the compressor, weighs 189 kilograms (416.67 lb). The bore measures 84.5 millimeters (3.33 in) and the stroke 89.0 millimeters (3.5 in), producing a swept volume of 2,995 cm3.

Reinforcements on the crankcase

Audi has included a whole array of refined hi-tech features on the 3.0 TFSI. The crankcase has been adapted to the higher prevailing pressures and all components are frictionally optimized. The two intake camshafts can be adjusted through 42 degrees crankshaft angle. In the intake ports, tumble flaps induce movement in the incoming air to promote optimum mixture preparation.

The injection system is a fundamentally new design. A common rail system with six-hole injectors injects the fuel directly into the combustion chambers at a pressure of up to 150 bar. The injectors' highly dynamic response permits up to three fuel injections per operating cycle across an extensive range of the characteristic map. They, too, optimize the combustion process and therefore contribute to the impressive performance of the new 3.0 TFSI.

AUDI AG sold a total of 964,151 cars in 2007 and thus achieved its twelfth consecutive record year. With revenue of €33,617 million and profit before tax of €2,915 million, the company attained its best figures ever. Audi produces vehicles in Ingolstadt and Neckarsulm (Germany), Györ (Hungary), Changchun (China) and Brussels (Belgium). At the end of 2007, production of the Audi A6 started in Aurangabad, India. The company is active in more than 100 markets worldwide. AUDI AG's wholly owned subsidiaries include Lamborghini S.p.A. in Sant'Agata Bolognese, Italy, and quattro GmbH in Neckarsulm. Audi currently employs around 54,000 people worldwide, including 45,000 in Germany. The brand with the four rings invests more than € 2 billion each year in order to sustain the company's technological lead embodied in its "Vorsprung durch Technik" slogan. Audi plans to significantly increase the number of models in its portfolio by 2015, from the 26 currently on offer to 40.

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    • 1 Second Ago
      • 7 Years Ago
      So the new S4 will be _less_ powerful than the old one? Blech.
      • 7 Years Ago
      I'm all about the new A4 with the revamped 2.0T (especially considering the aftermarket that this engine already has), but the supercharged 3.0L is icing on the cake.

      The only thing that concerns me is its placement in the S4, as that model is quite a bit of a step up in price from the 3.2 FSI. Granted you end up with a more powerful engine, and better dynamics, you still have to question the pricing of an S4 especially when it is butting up against M3/IS-F/ price territory.
        • 7 Years Ago
        Since the performance data isn't out yet, I'm gonna keep my mouth shut, but I think people would just grab a 335i or 335xi instead, probably close to the S4 performance wise yet cheaper.
        • 7 Years Ago
        S4 vs 335
        RS4 vs M3

      • 7 Years Ago
      Another victory for the TVS supercharger!
      • 7 Years Ago
      Am I the only person who is a bit disappointed with this engine?

      First, the V8 of the B6 & B7 S4, which will soon be retired, put out 340hp. I would have expected this engine to at LEAST match. Not drop its hp numbers by 50.

      Second, why should people buy this car over the new 3.0 TDI they will be putting in A4's? Stock, it will put out 240hp and 370lbft of torque. Chipped(for about 2 grand, which will undoubtably be less than going from a 3.0TDI to S4) it puts out 300hp and 430lbft of torque...and get 40mpg.

      And the final portion of my rant is the fact that with a $600 chip, a 2.7TT V6 of years gone by(introduced late 1990's) will eclipse the hp and torque numbers of this new engine.

      Audi, prove me wrong and make this engine a huge seller, but until then I will remain skeptical.
        • 7 Years Ago
        They've always had two gasoline engines for the A4, right? First the 1.8T and the 3.0V6, and now the 2.0T and the 3.2. It's conceivable that the 2.0T and 3.0TFSI will be the engines while the S4 will get a higher-powered version. The S5 makes 354 and the RS4 makes 420. I don't think Audi would let there be a 54hp gap between the S4 and S5. Who knows, though.

        As for the 3.0TDI, I'd love to see that but I live in California - can it pass the CAFE 2009 standards?
        • 7 Years Ago
        im pretty certain the new 3.0 TDI is 50-state legal.
      • 7 Years Ago
      This engine is meant for the A6, the S4 will probably get a 340hp version.
      • 7 Years Ago
      the 4 lobe blower must be the supercharging way of the future (i agree with it)
      along with dual scroll turbos, we'll prob see it pop-up everywhere, and definitely in the aftermarket.
      • 7 Years Ago
      Am i the only one that thinks this thing needs a good 50 more HP to be relevant?
        • 7 Years Ago
        No, you're not. This is a step down from the old S4.
        • 7 Years Ago
        So i take it everyone is ignoring how much LIGHTER and better balanced and stiffer the new chassis is? 10% lighter? And who's got the press release indicating audi will not be using a more powerful iteration of this engine for the S4? that's not what I've been hearing at infineon
      • 7 Years Ago
      What?!?!? -A Roots instead of a Lysholm??? -Audi, you SUCK.
      -Alumminumt undt Sccchteeel be damned!!!
        • 7 Years Ago
        Lsyholms tend to be hella noisy last I checked
      • 7 Years Ago
      Hmm..I'm confused. Is this supposed to be the powerplant for the new S4? I thought there would be a high output version of this that would produce at least 340-350hp?
      Hmm...rethinking if the new S4 woulda be one of my choices for a new car now...
      • 7 Years Ago
      Definitely a positive move. 300 hp is ideal in any road car, so the smaller the package, the better.

      This motor is still heavier and less powerful than the 3.0tt from BMW, but its probably a heck of a lot cheaper to produce. Its block is iron, as opposed to that zinc/aluminum alloy in the BMW, and a single supercharger has to cost about a quarter the price of two turbochargers.

      Here's to hoping the next S4 starts at a much lower price than the current one!
        • 7 Years Ago
        "Cheaper? Seriously?"

        Is the weight advantage and potential power difference worth the $5K upcharge over a comparible 335xi? Better yet the $10K over a G35x (or should I say G37x, because it is coming)?

        All I'm saying (as well as others), why can't audi put this engine into a regular old A4. That way not everyone is forced to pay a premium for performance that every other manufacturer offers for a lot less.
        • 7 Years Ago
        Where did you read this engine is heavier and made iron? Plus this engine has a better power band than the 335i engine.
        • 7 Years Ago
        The BMW engine is heaver than an LS3 and produces 2/3rds the HP. Silly.
        • 7 Years Ago
        Gosh, I really can't remember or read. The N54's block isn't the one in the N52 though. From that wikipedia page...

        "Surprisingly the engine block of the N54B30 is similar to the older generation BMW M54B30 engine - all aluminum with cast iron cylinder liners. This is due to the fact that the newer N52 aluminum-magnesium engine block was not deemed as suitable for turbo-charging with the above-mentioned engineering goals. As a result, the N54B30 is physically heavier (195 kg/429 lb) than the very light (161 kg/354 lb) N52 engine."

        ...I'll just shut my trap for now... ;)
        • 7 Years Ago
        A BMW 335i achieves 30% better fuel economy then a Corvette while being 100kg heavier and shorter geared. Not to mention the superior powerband of the 335i. Silly.
        • 7 Years Ago
        Cheaper? Seriously? It'll have more power and weigh LESS then the 335i, I don't see audi pricing a more powerful lighter car which finally handles better cheaper than it's outgoing model.
        • 7 Years Ago
        Quote from psu48187 - "All I'm saying (as well as others), why can't audi put this engine into a regular old A4. That way not everyone is forced to pay a premium for performance that every other manufacturer offers for a lot less." -

        What makes you think it won't be? The story never once said that this was the same engine used only in the new S4. Other AB posts have also stated that the 3.0TFSI will be offered with about 350HP in the S4 and with less power for other models. Re-read some of those posts.

        This is just a post about the unveiling of the engine with more info. It should not be construed as an intro of the S4's engine. But, it is about 90% of the S4 engine I'd guess, just different output.

        Kind of similar to how the Audi TTS has a 2.0T engine but it's more powerful than the base 2.0T in the TT. No one is assumed that the TTS had the same 200HP 2.0T.
      • 7 Years Ago
      Looks like another victory over BMW is coming soon.
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