The 2L Ecoboost motot in the Evoque was impressive, smooth, flexible and more power than the V6 Roadster... 240bhp.
So putting the 1L Ecoboost in the our proposed 3/3 would be great. I'd guess 0-60 in about 6.5 seconds and 60mpg. As Jays sad, "what's not to like?"
The only issue with all these turbos is where to put the intercooler. The Evoque air/air radiator was larger than the coolant radiator. But the 3/3 would have a nice large flat rad, so probably OK.