RI A6

It's a slam dunk with a turbo or a supercharger to get 100hp/L, but not with an NA engine.

absoluteis

I think they are all worldclass powerplants. And we are all worldclass people. Kumba-ya !

Tailspin

E46 M3, BMW M5, lotus elise (or any other toyota motor of that variant) the list goes on.

As far as boosted motors go the 4G63, EJ-series (ej257-20T-22T), any ford cosworth 4 cylinder, 2JZ, or any thing of that sort will hold more hp than the RS4's motor, as well have a better volumetric efficiency (given efficiency of rod/piston ratio a/f and how well they expell exhaust with what velocity). They're good engines, so you can't just out them because they're turbo'd. Fact is they'll make more hp than the RS4 motor in N/A or supercharged/turbocharged trim.

Even if you could turbo the RS4 motor, I highly doubt it would make the power of the above motors in stock form.

Bob W.

the word 'combination' doesn't appear in that sentence.

Tailspin

You can't rate a motor on hp/l alone, which you seem to be doing. I also proved you wrong by posting a RANGE of companies that have achieved the 100hp/l goal. If that's your theory on a motor achieving greatness then I've proved you wrong in that dept.


Please post something remotely of substance to tell me that the RS4 motor is better than any of the 100hp/l motors I posted. I see I won't be able to get to you with arguing tubo and n/a motors, because you don't understand enough about the characteristics of an engine, how to measure potential, and things of the sort.

Bob W.

1. Audi RS4
Engine Code: N/A
Bore/Stroke: 3.33" x 3.65"
Redline: 8250rpm
Piston Speed: 5024 ft/min

2. Honda S2000:
Engine Code: F20C1
Bore/Stroke: 3.43" X 3.31"
Redline: 9000rpm
Piston Speed: 4965 Ft/min

3. Lamborghini Gallardo
Engine Code: N/A
Bore/Stroke: 3.25" X 3.65"
Redline: 8000rpm
Piston Speed: 4866.67 Ft/min

4. Acura Integra Type R
Engine Code: B18C5
Bore/Stroke: 3.19" X 3.43"
Redline: 8400rpm
Piston Speed: 4802 Ft/min

5. BMW M3 (Germany)
Engine Code: S54
Bore/Stroke: 3.43" X 3.58"
Redline: 8000rpm
Piston Speed: 4773.33 Ft/min

6. Honda S2000 2004
Engine Code: F22C
Bore/Stroke: 3.43" X 3.57"
Redline: 8000rpm
Piston Speed: 4760 Ft/min

7. Honda Integra Type R (JDM)
Engine Code: K20A
Bore/Stroke: 3.39" X 3.39"
Redline: 8400rpm
Piston Speed: 4746 Ft/min

8. Acura Integra GSR 2001
Engine Code: B18C
Bore/Stroke: 3.19" X 3.43"
Redline: 8200rpm
Piston Speed: 4687.67 Ft/min

9. Saleen S7
Engine Code: N/A
Bore/Stroke: 4.13" X 4.00"
Redline: 7000rpm
Piston Speed: 4666.67 Ft/min

10. Acura TSX
Engine Code: K24A2
Bore/Stroke: 3.43" X 3.90"
Redline: 7100rpm
Piston Speed: 4615 Ft/min

11. Suzuki Hayabusa Sport Prototype
Engine Code: W701
Bore/Stroke: 3.19" X 2.48"
Redline: 11000rpm
Piston Speed: 4546.67 Ft/min

12. Honda Civic Type R
Engine Code: B16B
Bore/Stroke: 3.19" X 3.03"
Redline: 9000rpm
Piston Speed: 4545 Ft/min

13. Toyota Celica GTS / Matrix XRS 2001
Engine Code: 2ZZ-GE
Bore/Stroke: 3.23" X 3.35"
Redline: 8100rpm
Piston Speed: 4522.5 Ft/min

14. Honda Prelude Type S (JDM)
Engine Code: H22A
Bore/Stroke: 3.43" X 3.57"
Redline: 7500rpm
Piston Speed: 4462.5 Ft/min

15. Acura RSX Type S
Engine Code: K20A2
Bore/Stroke: 3.38" X 3.38"
Redline: 7900rpm
Piston Speed: 4450.33 Ft/min

16. Ferrari 360 Modena (incl. Challenge, Stradale, etc)
Engine Code: N/A
Bore/Stroke: 3.35" X 3.11"
Redline: 8500rpm
Piston Speed: 4405.83 Ft/min

17. Lamborghini Murcielago
Engine Code: N/A
Bore/Stroke: 3.43" X 3.42"
Redline: 7600rpm
Piston Speed: 4332 Ft/min

18. McLaren F1
Engine Code: N/A (BMW V12)
Bore/Stroke: 3.39" X 3.43"
Redline: 7500rpm
Piston Speed: 4287.5 Ft/min

19. Renault Clio 2.0 RS 2003
Engine Code: F4R
Bore/Stroke: 3.26" X 3.66"
Redline: 7000rpm
Piston Speed: 4270 Ft/min

20. Porsche 911 GT3 RS 2004
Engine Code: N/A
Bore/Stroke: 3.94" X 3.01"
Redline: 8500rpm
Piston Speed: 4264.17 Ft/min

21. Pagani Zonda C12S
Engine Code: M120 7.3 AMG
Bore/Stroke: 3.6" X 3.64"
Redline: 7000rpm
Piston Speed: 4246.67 Ft/min

22. Peugeot 206RC 2004
Engine Code: EW10 J4 S
Bore/Stroke: 3.35" X 3.46"
Redline: 7300rpm
Piston Speed: 4209.67 Ft/min

23. Porsche Carrera GT
Engine Code: N/A
Bore/Stroke: 3.86" X 2.99"
Redline: 8400rpm
Piston Speed: 4186 Ft/min

24. Acura NSX-T
Engine Code: C32B
Bore/Stroke: 3.66" X 3.07"
Redline: 8000rpm
Piston Speed: 4093.33 Ft/min

25. BMW M5 2002
Engine Code: S62
Bore/Stroke: 3.70" X 3.50"
Redline: 7000rpm
Piston Speed: 4083.33 Ft/min

26. BMW M5 E60
Engine Code: S65 (?)
Bore/Stroke: 3.62" X 2.96"
Redline: 8250rpm
Piston Speed: 4070 Ft/min

27. Nissan Primera W20V
Engine Code: N/A
Bore/Stroke: 3.39" X 3.39"
Redline: 7200rpm
Piston Speed: 4068 Ft/min

28. Ferrari Enzo
Engine Code: F140
Bore/Stroke: 3.62" X 2.96"
Redline: 8000rpm
Piston Speed: 3946.67 Ft/min

29. Ferrari 575 Maranello
Engine Code: 650 V21
Bore/Stroke: 3.50" X 3.03"
Redline: 7750rpm
Piston Speed: 3913.75 Ft/min

Bob W.

<ul><li><a href="https://forums.audiworld.com/rs4b7/msgs/23548.phtml">remotely of substance</a></li></ul>

Tailspin

TELL me how approaching near F1 piston speeds makes your engine better than #2? In fact tell me what benefit a faster piston speed provides, what does it do for power, how does it affect anything engine wise?

Also notice the lower stroke on the F20C1? Lower displacement and yet it still flows exhaust gas better than an RS4. So tell me bob w. what exactly is the signifigance of your postings in relation to proving me wrong that the F20C is a better motor than or equal to the RS4.

In layman's terms the F20C will and I'll put money on it handle high compression N/A, supercharged, and turbocharged applications better than the 4.2L FSI. Might also want to check that Stroke on the honda motors in comparison to the RS4's motor, they're damn close in piston distance traveled/time. I wouldn't doubt them being able to get there with different rods.

RI A6

And what are your professional qualifications? Are you trying to start a fight. I agreed with you and said "I stand corrected." What the f--- more do you want.

Bob W.

it took about 30 seconds, and I never said it was 'better' than anything.