What would you like to do?
If it's a tenderloin roast, you can figure about an hour to an hour and fifteen minutes. If it's a thicker cut, give it another half hour. I'd crank the heat up a little bit, though. If you can, go to 375 to give it a nice roasted outer coating. Two and a half pounds isn't a lot; make sure you watch it every fifteen minutes or so while it roasts so you catch it before it gets dried out.
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I think 40mins per pound
3 hours at 325 or until done at 190 on the thermometer.
When roasing a pork joint then you should look at about 40 min + 20 per 450g ie.. 1hour 20 min for 900g. An easy trick with a pork joint is to insert a small knife into the ce…nter of the joint, if the juices run clear (not pink ) its cooked. Cook at about 180c basting regualy.
along time i would put it up to 300 and it would be bout 4 to 5 hours
20 minutes a pound
A 6lb boneless pork loin roast should cook in a crock pot on high for 3-4 hours. A pork loin roast in the oven should cook for about 2 hours on 350 degrees.
i say cook@ 400 for ten minutes then turn down to 325 and cook until internal temp is 165 -170 degrees.
A general estimate is 50 minutes per pound, so 2 1/2 to 3 hours at 325 or 350 degrees F. You should check on it after 2 hours and add liquid if the pan is drying out….
Pork should not necessarily be cooked according to "time". It should be cooked to 160 degrees at the center of the roast. One important note is that it should also be cooked… at a relatively low temp. Approx. 325 degree oven. High temps can cook the outer portion of the roast too quickly & dry it out and the center may not be cooked to optimal temperature making it dangerous too eat.
Roasting it at 325 degrees for about 2 1/2 hours should do it nicely.
3 hr.s or untill the internal temperature reaches a 160 degrees
General 'rule of thumb' - 20 minutes per lb plus another 20 minutes. In this case it would be 5 hours, 20 minutes.
It is recommended to cook a pork tenderloin for 1 to 1.5 hours per pound when using a low temperature such as 265 degrees. For a 2.5 lb. tenderloin this would be about 2.5 to… almost 4 hours. The internal temperature of the tenderloin must reach at least 165 degrees to be considered safe to eat.
The 'general' rule for cooking meat - is 20 minutes per pound plus another 20 minutes. In this case, you would cook it for a total of 2 hours 40 minutes.