Is a 1991 Honda Accord have a non-interfere nce engine?

NO, The 2.2 L Honda 4 cylinder IS an Interference engine. Engine damage will occur if the belt breaks. Should be replaced at 90,000 miles. I would also suggest you replace the water pump at the same time. This will save you money down the road when the pump fails. The life expectancy of the pump is around 100,000 miles.