audi unveils supercharged 3.0L TFSI V6

Audi AG is returning to its roots, in more than just the figurative sense, as it unveils a new premium 3.0L DOHC V-6 fitted with a supercharger and direct-gasoline injection.

Expected to be offered in the all-new ’09 S4 sport sedan (replacing the previous model’s thirsty 4.2L V-8), as well as the midsize A6 range when it goes into production later this year, the new engine produces 290 hp at nearly 5,000 rpm and 310 lb.-ft. (410 Nm) of torque between 2,500 rpm and 4,850 rpm.
Although labeled a TFSI (Turbocharged Fuel Straight Injection) mill, similar to the auto maker’s Ward’s 10 Best Engines-winning 2.0L turbo-4, Audi says the “T” no longer exclusively designates turbocharging as a means of forced induction.

The 4-ring brand is no stranger to belt-driven superchargers, as its Grand Prix racers built by Auto Union in the 1930s employed compressors to yield as much as 600 hp from their 12- and 16-cyl. engines.

Audi says the decision to return to the technology, rather than designing a twin-turbo setup for the new V-6, stems from packaging and throttle-response advantages brought by the roots-type supercharger’s layout.

The unit takes the place of the intake manifold and nestles between the engine’s 90-degree cylinder banks.
Supercharged 3.0L V-6 expected to power all-new ’09 S4 sedan.

Belt-driven off the crankshaft that can spin up to 6,500 rpm, the mechanical compressor’s 4-lobe rotors can generate nearly 12 psi (0.8 bar) at speeds approaching 23,000 rpm.

Combined with a new DGI system, which features common-rail fueling and 6-hole injectors capable of three injections per cycle, the result is a compact and efficient powerplant with solid low-revving responsiveness, Audi says.

Twin water-to-air intercoolers, connected by a separate cooling circuit, chill the incoming air for better combustion, while acoustic management keeps the supercharger’s inherent whine to a minimum.

Other highlights include tumble flaps in the intake ports for optimal fuel-air mixing, as well as a total package weight of 417 lbs. (189 kg).

Although the 3.0L TFSI V-6 has a lofty 10.5:1 compression ratio, the auto maker says it can operate on either regular or premium gasoline, while also meeting Euro 5 emissions limits.

In addition, the low-end power allows the engine to be paired with taller, more-efficient transmission ratios, with fuel consumption in vehicles sporting longitudinal drivetrains averaging at least 24 mpg (10 L/100 km) in the European cycle.
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By Mike Sutton

Now the only thing left to do is to mount it so it hangs entirely in front of the front axle line for that classic Audi understeer FWD feel.

They do sit kinda forward, dont they? :lol
It seems like a pretty sweet motor though. I think an S4 with that would be quite nice.

Oh, a 4 lobe (Eaton Gen VI) supercharger . . . ?

Where was the first place we saw that? Oh yes, a Corvette! (ZR1). Oh, did you ever read about the suspension on the 599 Fiorano? Where was the first place we saw that? Oh yes, a Corvette! (50th Anniversary edition).

What’s next? Audi will cure its nose-heavy, plow-like drive dynamics with . . . leaf springs? Where was the first place we saw those? Oh yes . . . Chariots.

Spoken like a true BMW driver… Do you write comparos for C&D in your spare time, may I ask?

;D

That is why you’re the man :thumb

You know . . . I’m fucking sick of “pretty sweet”. Cars have all gained 500-1000 lbs in the last 15 years, so fuck their horsepower improvements.

I want 100 Octane at $1.00 a gallon. I want Blood for Oil! I don’t want pretty sweet. I want certified uncontrollable . . .

This is a good start: http://youtube.com/watch?v=2M5l60FNORQ

looks like we are back in the 70s. Big gas guzzling boats for cars and rediculous gas prices. At least the cars are faster and easier to park now. We have learned nothing.

I like the new Audi engine… If only it came with twin KO4s instead of a blower then we would be talking

I dont, but I have a good friend that writes for C&D. I pull all my jokes from him.

they seem to be pulling away from twin turbo setups for the most part. people drive em like tools and cook the oil in the housings and then bitch and moan that they cars suck. 99% of the time its user error. im curious to see how the motors will run, because i mean, how often do you a supercharged Audi around town?

Driving a car hard is no reason for it to break.

no no, driving hard isnt, but driving like a tool is. like you said “maintain your shit”, these people dont :idiots

Hold judgment on that until the thing hits the street – Eaton’s sixth generation superchargers are showing adiabatic efficiency near to that of a turbo (~70% vs. ~80%). Generally speaking, superchargers are a little more robust (for a variety of reasons) and if Audi can pull off 12 PSI on a 10.5-to-1 engine, that’ll be very impressive.

Crank driven forced induction combined with that compression should be fantastic throttle response. Certainly Audi will water it down because, let’s face it, they’re German. None-the-less . . . clever tuners capable of bypassing the nanny systems (and voiding the warranty) will unlock what’ll probably be a brutal shove at the push of the throttle.

i want to test drive one :slight_smile: from what it is, it seems like the throttle responce will indeed be magic, but tuned up nicely? oooohohoho!