Bob W.

assuming the UK website is correct, the tech specs for the RS4 motor show "4-valve technology"...am I alone in seeing this for the first time? Or is it just a typo?

Hal_TT::CBP

No room with the FSI for 5 valves. R8 has been 4-valve since day-one as well.

SCJ

All FSI engines now, 4, 6, or 8 cylinders, have 4 valves!

VerrÜckt

No room for 5 valves.

BenM@University Audi

There has been much speculation as far as maximum attainable power output, but many high high hp engines use 4 vavles per cylinder, not 5. See: just about any other engine besides the 2.7T or 1.8T.

I'm sure the 2.0T will make higher hp in the future, hell it's making 260-270hp with just a chip/exhaust. I'm pretty sure audi is phasing 5v technology out completely and reverting back to 4.

Bob W.

...a beefed up S4 motor with FSI. I'm not sure how I feel about this.

Schadenfreude

Why, it's not like you could retrofit FSI to out engine anyway

sekki (02S4)

Excuse my n00b question, but what does FSI stand for?

ub2slw

It just needs different heads, new fuel pump and ecu. I would like to try it but at 3k PER head (loaded) the price was a LITTLE much.

ub2slw

i bought an intake and exhaust valve to spec against a stock s4 vavle....I did not know that the rs4 has 4v per cyl.