Nissan uses a straightforward method of naming theirautomobileengines. The first few letters identify the engine family. The next digits are the displacement indeciliters. The following letters identify features added.
| Letter | Feature |
|---|---|
| D | DOHC,Variable Valve Timing, orDiesel |
| DD | Direct Injection |
| E | ElectronicFuel Injection |
| EM | Electric Motor |
| HR | High Response and High Revolution |
| i | Throttle Body Fuel Injection |
| N | Natural gas fueled |
| P | LPG fueled |
| R | Supercharged |
| S | Electronic ControlledCarburetor |
| T | Turbocharged - this can also stand for Twin Carburetor |
| TT | Twin-Turbocharged |
| V | Variable Valve Timing with Lift |
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