selling it off and going for older car doesn't really help
your only choice is to change new car
going old is only going for more power...not lower FC..the older the car, the FC is usually higher

it is considered quite powerful for a new generation car
if compare to old car..like civic, corolla or waja...of course old car win...response also faster(no lag)
new car/new engine all want to pass emmision test that they tuned down the power to nothing
so with a "persona engine" put into a lighter weight saga...its actually consider powerful already

more powerful car of course go old school
but those car isn't cheap to maintain if got major problem as well
new car part not cheap but if under warranty thn no worries, only worry abt wear and tear part only
after warranty end, part price will drop already
but since he owns a neo already..thn hard to decide..might as well keep his car