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      02-15-2008, 12:41 PM   #1

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Another RS5 Rendering and engine speculations, along w/ TTRS:

Details on the RS5 are less known, but strong theories are out there. S5 mules have been spotted testing in Europe well after the S5’s launch, and with the trademark RS oval tailpipes. They’re likely RS5 mules and we even hear that there may be an RS5 mule high altitude testing in America.

Print magazines have hinted at a number of engine directions – from the RS4’s high-revving 4.2-liter V8 carryover to the twin-turbocharged V10 of the RS 6 and everything in between. Here’s a quick rundown, supported with our own theories and comments shared by sources at Audi.

1. V10 Twin Turbo – This is an unlikely choice. Fitted in the RS 6, the engine forces pricing of the A6 variant into six-figure territory. Packaging might also prove difficult as the already sizeable V10 also has the turbo system’s plumbing.

2. V10 Normally Aspirated – The most recent issue of Road & Track raised this scenario. The American print magazine said sources close to the book have stated that Audi is working on a high-revving V10 FSI – what the RS4 4.2 is to normal 4.2 FSI, this engine would be to the S8’s V10. R&T’s suggestion points toward a shared approach with the upcoming R8 V10. That scenario doesn’t sound totally unbelievable and, should Audi be able to hit the magical100 hp/liter mark of the RS4, that would mean 520 hp. Still, one source at Audi says the V10’s fitment in the S5 chassis is unlikely but wouldn’t rule it out.

3. Forced Induction 4.2-liter FSI – Utter those words and people will immediately think of the last-generation RS6 and its twin turbo V8. The UK’s Car Magazine seems to think this scenario is most likely, suggesting 450 hp and 500 ft-lbs. of would could come from a mildly turboed RS4 engine.

Our own sources say this is unlikely in the details. First, the RS4’s high-revving setup likely wouldn’t get forced induction. Figure something more like the S5’s 4.2 FSI. If the next-generation S4 is supercharged says that source, then figure the lessons learned might be applied to other engines also. Fit a supercharger to the S5’s engine and the power figures suggested by Car aren’t out of reach.

4. V8 Normally Aspirated, RS4-spec – At 420 hp from 4.2-liters, the RS 4 engine is by far no slouch. Top Gear’s Jeremy Clarkson has raved about the mill, saying it might just be one of the best engines ever. Carrying over the engine lock, stock and barrel from the outgoing RS 4 is another possible scenario. No, it’s nothing new, but it’s still great and would be a ton of fun in the better-balanced B8-chassis coupe.

At this point, it’s a bit to0 early to make the call. Options 2, 3, and 4 all seem like believable scenarios, so we’ll hold off on betting the farm on which will get the nod just yet. One thing’s for sure, any one of the four would be formidable with the platform, Audi Drive Select and the next-generation torque-vectoring quattro.

As with the TTRS, the RS5 rendering above shows how the upcoming car might appear if it were launched today. The latest RS design language from the RS6 such as the nose, wheels, ur Quattro-inspired blister fenders and more have been applied to the A5’s lithe silhouette. It all looks fantastic in Audi’s Ibis White with titanium finish on the RS6 alloys.

Rumors of the hottest TT variant ever are rampant. Several theories on drivetrain have resulted, though our money is on a turbocharged five cylinder. Volkswagen already does a low cost and lower capacity 5-cylinder with 2.5-liters, though an Audi version sharing very little with the base VW engine will be a considerably more costly and possibly a different displacement (we’ve heard 2.3-liters from one source) – built up to meet a power rating of 350-hp says a high-ranking source from Audi in Germany.

What else can we guess about the engine? FSI is a certainty, and Audi’s new Valvelift system is likely – aiding in both torque and fuel economy. 2.0T engines we’ve driven with the same FSI/Valvelift setup are burgeoning with torque and we expect no different from the TTRS’ five cylinder.

A turbocharged five-cylinder Audi engine in a performance coupe certainly pays homage to the original Quattro, though the TT’s transverse engine layout lower and closer to the center of the chassis, aluminum body structure and computer-controlled Haldex-sourced version of quattro will make it a decidedly different beast than the boxy Audi icon.

As far as U.S. sale, sources have informed us that the plan is to currently include the TTRS in the American mix. The current plan for DSG-only in the States for the recently announced TTS is likely a hint that a manual-transmission TTRS is the likely shifting choice for the RS.

Our TTRS rendering shows what the car might look like if it were launched today. Audi has been known to share design language across its sub brands and the RS nomenclature is no different. This TTRS mockup uses a similar nose and sill extensions from the latest RS6, along with the car’s 5-spoke alloys with Titanium Package finish. It’s also Avus Silver Metallic – a color Audi usually reserves for RS duty.
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      02-15-2008, 02:17 PM   #2
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I don't like the idea of opinion #1, v10tt would weigh a mountain and the effect on it's handling would lead to a car very similar to that of the M6 were you manage the speed in the corners to then bomb it on the straights. Even opinion #2 doesn't sound like the best option as it too would weigh a lot.

I personally like the idea of #3, a v8 forced induction unit sounds the best option of the lot as you get the power and the torque in a lighter package and if they decided to got for the supercharger version then it's weight would be even better again, all boosting the handling even more.

I wish we could see a better view because apart from the RS6 rims there looks to be nothing different to my S5.
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      02-19-2008, 12:07 AM   #3
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If they plan on having the RS5 be anywhere below 90K a V10 is out of the question. I could see a 4.2 RS V8 turbo or not. The TTRS is likely to run that turbo 5 CYL, only I'll bet the Z4M will still be a better track/drivers car (least thats the scenario every time.)
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