I stand corrected on the 3L figures.Information like power figures is readily available from various reputable sources, I am not aware of what you have been reading.
But i highly doubt there is a 5 kw difference between engine models.
My information on the 3.2 engine is this,
3179cc
290 hp (216 kw)
224 lb-ft(304 nm)
Are you saying the 3.2 is not 290 hp?