Dont need a larger motor on the Smart....just add boost
7-8psi 140hp - plenty of zip for the smart
If they bring the turbo smarts over THAT would be awesome.....many young folks here buying SCION, Nissan cube stuff to win over with a zippy smart car.
Considering it would only add maybe 2-3K to the sticker price I would be willing to bet it would increase demand for the smart by a significant margin.