What temperature and for how long do you cook a 1.6 kg pork roast?

For a 1.6 kg pork roast, cook it at 180°C (350°F) for about 25 to 30 minutes per kilogram. This means you should aim for a total cooking time of approximately 40 to 50 minutes. Ensure the internal temperature reaches at least 63°C (145°F) for safe consumption, allowing it to rest for a few minutes before slicing.