but plz,comparing this 2 r silly la,both hv pro n cons,problem with na is that to achieve great horsepower normally associates with bigger cc,turbo car can hv much more smaller cc but with the force induction introduce produce higher hp than na...for us wif tight budget,having a 250hp turbo engine which cost around rm3-4 k is cheap considering if u hv a 150hp na n want to make it to that 250 mark might blow a hole in ur pocket...that's y la if we keep on talking how to make our na more powerful,a lot of ppl will recommend u to change to turbo hafkat engine,whether u r driving a wira/satria/perdana/all kcar whatsoever...u tell me,how many ppl in Malaysia driving either a 3.2L V6,a 5L V12,or a 8L V10,still the hp they produce is not that awesome comparing what a force induction like supercharger/turbocharger can give...the torque,the adrenaline rush,for just a fraction of the money...