The new Ecotec is actually an older Quad 4 that has been reworked MANY times. Back in 90 the 2.3 Quad 4 HO pushed 180hp in the Beretta'*. Over the years it was "improved" but detuned as well. The new Ecotec is basically a detuned Quad making 140hp...but with some simple cam swapping and what not, you can have them up over 200hp easy. I've said it before and I'll stand by it, I like the Ecotec engine.
Stock for stock, I highly doubt a stock Ecotec could take your L27, but then again they make one crazy 5 speed in the Cavi'*.