Up to 5 typical design features are used for engine identification. These are explained below using 2 examples.
| Petrol engine (example) | Diesel engine (example) | ||
|---|---|---|---|
| Z | ....exhaust emissions standard | X | ....exhaust emissions standard |
| 16 | ....engine size | 20 | ....engine size |
| Y | ....compression ratio | D | ....mixture system |
| E | ....mixture system | T | ....spec. version |
| H | ....spec. version | ||
Explanations
| Exhaust emissions standard | X | 96/69/EC, D3/D4 | ||
|---|---|---|---|---|
| Y | 68/69/EC, Euro 3/D3 or Euro 3/D4 | |||
| Z | 68/69/EC, Euro 3/D4 or Euro 4 | |||
| Engine size | x 0.1 = displacement in litres | |||
| Compression ratio | L | > 8.5 – 9.0 : 1 | X | > 10.0 – 11.5 : 1 |
| N | > 9.0 – 9.5 : 1 | Y | > 13.0 : 1 | |
| S | > 9.5 – 10.0 : 1 | |||
| Mixture system | D | Diesel | N | Natural |
| E | Injection | Z | Central injection | |
| Special version (as required) | G | Gas | R | Increased output |
| H | High performance/supercharging | T | Turbocharging | |
| L | Low performance / supercharging | V | Volume model | |
