Look at your VIN (Vehicle Identification Number) usually the 8th digit is the engine code. Then just google its engine code with the corresponding Letter.
Easiest way is with a Diagnostic Scanner connected to the OBDII port usually under the dash but easilly visible from underneath the dash and usually on the driver side. Location can vary from car to...
An engine code reader tool is needed to read a vehicle's engine trouble codes. Most auto parts store have them available and they can check the code for you by plugging it into your vehicle's OBD...