Engine Number/Engine Characteristics
WARNING: This page is about a different car, the 2015 Audi S7, 2015 Audi RS 7, 2014 Audi S7, 2014 Audi RS 7, and 2013 Audi S7. However, it is still accessible from the selected car via links, so may be relevant.
Engine Number
NOTE:
The engine number -arrow B- is visible, if the housing for the charge air cooler is removed.
The first 3 digits of the engine code -arrow A- are visible, when the engine cover is removed.
- The engine serial number ("engine code" and "serial number") is located on the front of the cylinder block on the left side -arrow B-.
- Engine codes beginning with "C" are four-digit.
- The first three digits of the engine code stand for displacement and the mechanical structure of the engine. They are stamped in the cylinder block, including the serial number.
- The fourth digit describes the engine output and torque and depends on the engine control module.
NOTE:
The four digit engine code is on the type plate, vehicle data label and engine control module.
For the location of the type plate and vehicle data label, refer to the appropriate FLUID CAPACITY information .
Engine Data
| Codes | CEUC | CEUD | CRDB | |
|---|---|---|---|---|
| Displacement | liter | 3.999 | 3.999 | 3.999 |
| Output | kW at RPM | 309/5000 ••• 6400 | 300/5500 ••• 6400 | 412/5700 ••• 6600 |
| Torque | Nm at RPM | 550/1400 ••• 5200 | 550/1400 ••• 5200 | 700/1750 to 5500 |
| Bore | diameter in mm | 84.5 | 84.5 | 84.5 |
| Stroke | mm | 89.0 | 89.0 | 89.0 |
| Compression ratio | 10.1 | 10.1 | 9.3 | |
| RON | at least | 98 1) | 95 2) | 98 1) |
| Fuel injection and ignition system | Bosch Motronic | Bosch Motronic | Bosch Motronic | |
| Ignition sequence | 1-5-4-8-6-3-7-2 | 1-5-4-8-6-3-7-2 | 1-5-4-8-6-3-7-2 | |
| Exhaust Gas Recirculation (EGR) | no | no | no | |
| Turbocharger, G-Charger | 2 turbocharger | 2 turbocharger | 2 turbocharger | |
| Knock control | Four sensors | Four sensors | Four sensors | |
| Charge air cooler | yes | yes | yes | |
| Oxygen sensor regulation | 2 sensors before catalytic converter 2 sensors after catalytic converter | 2 sensors before catalytic converter 2 sensors after catalytic converter | 2 sensors before catalytic converter 2 sensors after catalytic converter | |
| Variable valve timing | Intake Exhaust | Intake Exhaust | Intake Exhaust | |
| Variable intake manifold | yes | yes | yes | |
| Secondary Air Injection System | yes | yes | yes | |
| Valve per cylinder | 4 | 4 | 4 | |
|
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