I don't think a semi will give the same results
the missus has driven my gti once as a learner, and loved it...might be on the look out for a 1.3 or 1.6 mk2 soon....
thinking of buying my lil sister a 1.0L 94 polo coupe, its awsome. if she dont like it ill dump the cupra and the G60 and use it
But for the purest engine experience, displacement has no replacement. All other methods are simply attempts to artificially recreate the benefits of displacement.