In any case, the Kuga should have enough power from it's 1.6 Ecoboost engine to haul itself. I would not be suprised if Ford decides to add a higher powered variant of the Kuga later on..
Remember, they did that wit the Escape (2.3L version) and last year they introduced a higher power version sof the S-MAx and Mondeo.
After reading about Ford's range of Ecoboost engines...I dont think the Kuga will disappoint.
They are already feauring the 1.0l Ecoboost that has the power of a 1.6L engine in the new Ford Focus in some markets. If you read about the
Ford 1.0L Ecoboost-engined racer, you'll get an idea of what these engines can do..

Yes, definitely 1.6 is enough to haul this baby. And hence why I mentioned that it is indeed the most practical and market suited engine to bring in.
But with a car weight of almost 1600kg (almost 4 persons heavier than a compact car and similar to larger sedans) and with such a huge body shape, the 1.6 is just A BIT lower than a power to weight ratio for a great drive when fully laden with people and luggage. Of course the NAs can't compare, those are way under power in my opinion and with passengers could be a drag even for the occasional highway overtaking.
I would think that an engine with between 280 to 295Nm with a flat torque curve between 2000rpm to 4000rpm would be a really good sweet spot for this car.
And I definitely know about these engines. I own a S-max 2.0 ecoboost 203PS first batch. But I chose to remap it to 240PS, similar to the new batch of Smax for a much smoother highway drive when fully laden. I don't speed on the highways. I stick to 110km/h but the 340Nm flat torque curve makes the car (with 4 adults, 1 kid, loads of baggages) overtake at say 150km/h quietly at low rpms without effort, making the driving experience superior. Of course 340Nm is not really necessary and hence my opinion of 280 to 295Nm for such cars as a balance between car cost, fuel economy and driving experience.