The compression ratio of a Nissan four cylinder engine can vary depending on the specific model and year of the vehicle. Here are some common compression ratios for Nissan four cylinder engines:
* 1.6-liter HR16DE engine: 10.6:1
* 1.8-liter MR18DE engine: 10.5:1
* 2.0-liter MR20DE engine: 10.0:1
* 2.5-liter QR25DE engine: 9.6:1
* 3.5-liter VQ35DE engine: 10.3:1