Cars Q&A

Sir,i would like to know which among these is quick as far as pick up and top speed is concerned..skoda octavia 1.8 turbo or skoda octavia 1.9 tdi...also which is a better buy ? but i concentrate on speed more than mileage. Also if you compare civic with octavia 1.8 petrol and 1.9 tdi which one's better keeping power as first priority. Thanks !!