Engine Identification
Up to 5 design-typical features are used for engine identification.
| Petrol Engine (Example) | Diesel Engine (Example) |
| X | Exhaust gas limit | X | Exhaust gas limit |
| 16 | Engine size | 17 | Engine size |
| X | Compression ratio | D | Mixture system |
| E | Mixture system | T | Specific version |
| L | Specific version | | |
| Exhaust Emission Limits | Carburetion System |
| none | : | ECE R 83 A (as R 15.04) | E | : | Injection |
| C | : | EC 91/441/EEC | Z | : | Central fuel injection |
| X | : | 94/12/EC | V | : | Carburettor |
| | | D | : | Diesel |
3.2 Engine Identification
| Engine Size | Specific Version (if required) |
| Displacement in litres x 0.1 | H | : | High output/supercharging |
| | | J | : | Throttled output |
| | | L | : | Low output/supercharging |
| | | R | : | Increased output |
| | | V | : | Volume model |
| | | 2 | : | Family II engine |
| Compression ratio ε | | | |
| | | | | |
| G | : ε ≤ 8.5 : 1 | | | | |
| L | : ε > 8.5 - 9.0 : 1 | | | | |
| N | : ε > 9.0 - 9.5 : 1 | | | | |
| S | : ε > 9.5 - 10.0 : 1 | | | | |
| X | : ε > 10.0 - 11.5 : 1 | | | | |
| Y | : ε > 11.5 : 1 | | | | |