I have a 95' 325i and I have no complaints about power. Although I do have a custom intake and exhaust but I probably only gained like 10 hp and 10 ft/lbs of torque. I just ordered a Dinan chip and I will get that installed for a little more power as well. I did some research and the Dinan chip seems to be the overall best. If you have all stock equipment then yeah you might experience some sluggishness but also if you have a stick 5-speed then a lot of it might have to do with how you drive it. If you haven't had a tune-up in a while, then that also might be a factor. There are many things you could do...such as just changing the spark plugs. Good luck.