Audi Model Rollout Schedule from Fall 2007 Quattro Quarterly
10-31-2007, 06:15 AM
#22
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Actually, 500 nm is 369 lbs/ft of torque, not 380 lbs/ft of torque, which is 515 nm, FWIW
A twin turbocharged or triple-charged (supercharged and twin turbocharged) petroleum 4.2L FSI V8 with valve-lift (an Audi engine) in the next RS 4 and RS 5, if the next RS 4 and RS 5 get a forced fed petroleum FSI V8 with valve-lift (again, an Audi engine), will most likely produce 391 lbs/ft of torque/530 nm, not 369 lbs/ft of torque/500nm or 380 lbs/ft of torque, which, again, is 515 nm, not 500 nm, just to be competitive with the BMW M3 and Mercedes C63 and CLK 63 AMGs. As for hp, I would say 464/470/346 SAE hp/DIN hp/kw.
10-31-2007, 06:55 AM
#23
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My point is that it is achievable and will be handled by the current transmission and driveline
Lets not pick nits here. About 500 Nm of torque is where the engine could be. What is currently in the RS4 is specified for 600 Nm of torque. In your previous post you said:
"Any six-speed manual transmission that can safely and reliably handle the mammoth torque that a forced fed V8 with 4.2L or 4.5L of displacement would have to produce just to be competitive in the B8 RS 4 and RS 5 would be way too big for the B8 platform"
do you really think they'll use valve lift technology in a high performance engine? I'm not so sure. There is no performance advantage at full throttle. I'd suspect that they run the high profile cam lobes full time and damn the fuel economy at low throttle, where valve lift helps.
It's also doubtful IMO that audi would design a new 4.5L engine. I don't believe they'll want to design a new block, (after just designing 3 new FSI blocks) to allow for increase bore diameter. The only other alternative is to increase the stroke, which would lower peak rpm.
"Any six-speed manual transmission that can safely and reliably handle the mammoth torque that a forced fed V8 with 4.2L or 4.5L of displacement would have to produce just to be competitive in the B8 RS 4 and RS 5 would be way too big for the B8 platform"
do you really think they'll use valve lift technology in a high performance engine? I'm not so sure. There is no performance advantage at full throttle. I'd suspect that they run the high profile cam lobes full time and damn the fuel economy at low throttle, where valve lift helps.
It's also doubtful IMO that audi would design a new 4.5L engine. I don't believe they'll want to design a new block, (after just designing 3 new FSI blocks) to allow for increase bore diameter. The only other alternative is to increase the stroke, which would lower peak rpm.
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