Think about the way local manufacturers are heading with their cars and ask why?
Holden's latest Cruze performance model has a turbo'd 1.4 litre, whereas the standard model has a 1.8. The sports model has greatly improved driveability, performance and economy. Holden reduced the capacity of the Alloytech to 3.0 litres, but increased the power and the economy. Whether you like it or not, that word "economy" has a great bearing on the direction that car development will continue to take in the future. Even the larger V8's are being developed with increased power AND economy. Because that's what the majority of motorists want and expect in new cars. The days of huge grunt with no compensatory fuel consumption reduction is dying out. You won't get an Alloytech 4 litre because there is no demand for it. If GM is screwing over 240 kw from the Alloytech, you have to wonder about the engine's low speed tractability and driveability. Driving conditions in the States probably suit such an engine because there are situations where such an engine is practical, whereas our lower speed limits and poorer road conditions, and smaller market, reduce the need or justification for such an engine. And from some of you have said, who'd want a killer V6 when a V8 does the job better for your?