Ford EcoBoost 500, the pioneer for downsizing gets bigger

Ford presented the next EcoBoost generation, keeping the I3 layout while cylinder displacement increases from 333 cc to 500 cc

The Engine achieved 117 kW/l and 140 kW/l at Comp Ratio of 12.5:1 and CR 9.5:1 respectively, both operating at full time lambda =1 and with quite good BSFC. How?