What is normal cylinder compression for 2003 Altima 2.5?

Normal cylinder compression for a 2003 Nissan Altima 2.5 typically ranges from 170 to 200 psi (pounds per square inch). It's important to ensure that all cylinders are within 10-15% of each other for optimal engine performance. If compression is significantly lower, it may indicate issues such as worn piston rings, damaged valves, or head gasket failure. Always consult a repair manual or a professional mechanic for specific diagnostics.