* 1.8L 4-cylinder: This was the base engine and produced 126 horsepower.
* 2.0L 4-cylinder: This was the more powerful option, generating 140 horsepower.
It's important to note that the specific engine size may vary depending on the trim level and whether it was a manual or automatic transmission. To be sure, you'll need to look up the specific details for your particular 2001 Nissan Sentra.
