Below is a few detail specifications of the SR16VE, SR16VE.N1 SR20VE, SR20VE 20V, SR20VET. These are what the engine looks like in it's unmodified stock form. The pictures shown are the closest to the stock form however they may slightly differ.

SR16VE

Displacement: 1.6L
Power: 173 BHP (129 kW) 
Torque: 119lb/ft
Production: 1997-2001
Found in Vehicles: Sunny VZR, Lucino ZVR, Pulsar VZR,

SR20VE

Displacement: 2.0L
Power: 187 BHP (139 kW)
Torque: 145lb/ft
Production: 1997-2001
Found in Vehicles: Primera, Bluebird, Wingroad

SR20VE 20V

Displacement: 2.0L
Power: 204 BHP (152 kW)
Torque: 152lb/ft
Production: 2001-2008
Found in Vehicles: Primera 20V

SR20VET

Displacement: 2.0L
Power: 276 BHP (206 kW)
Torque: 228lb/ft
Production: 2001-2008
Found in Vehicles: X-Trail GT

SR16VE.N1

Displacement: 1.6L
Power: 197 BHP (147 kW)
Torque: 119lb/ft
Production: 1997-1998
Found in Vehicles: Pulsar VZR.N1

Production: Only 500 Made