Simple. Their engine was a clean sheet design. Ours was an existing engine (the 5.7 aka 350) that was punched out to 6.2L Foreign cars get almost as much out of far less. The current WRX STI gets 305 hp out of only 2.5L. It's not that GM couldn't do it. It's that we don't want them to. Just make a post where the Z28 will get a turbo 4cyl and watch the angry posts fly on in.
