i used to drive a 91 VW jetta with a N/A 5spd. diesel in it....not a bad little car,but slow as molasses.....i dont think i could ever drive another diesel that isnt turbocharged....the power difference is amazing,i believe the mileage is better in a turbo engine....there are numerous pluses to having a turbo engine....i cant really come up with a downside to having a turbo versus a nonturbo