I'm very curious, I know this has been discussed many times, what makes the C20XE more powerful? The ecotec has a higher compression ratio (10.8:1 vs 10.5:1) yet makes less power than the XE. Also, according to auto-data the urban fuel consumption is 11l for the redtop and 12.5l for the ecotec. It makes no sense to me for the new engine to be less efficient and less powerful. Can anybody explain to me why is this?