First the engine; I haven't had any mechanical problems with the engine, it has 130,000 miles on it so far. I had to replace the bearings. The door ajar light used to stay on. The dome light has some issues. My speedometer cable currently isn't working. I get about 25 miles a gallon, with the 4 cylinder, which is pretty slow to me.
Good gas mileage, no engine troubles.
More power for the 4 cylinder, better working interior.