The Audi CTSA 2.5-liter turbo engine or RS Q3 2.5 TFSI was produced from 2013 to 2015 and was installed only on a charged modification of the Q3 model in the 8U body, known as the RS. Updated versions of this engine with a capacity of 340 hp and 367 hp have CZGA and CZGB indices.
The EA855 series includes: BGP, CBTA, CEPA, CTSA, DAZA, DNWA.
Specifications
| Production years | 2013-2015 |
| Displacement, cc | 2480 |
| Fuel system | direct injection |
| Power output, hp | 310 |
| Torque output, Nm | 420 |
| Cylinder block | cast iron R5 |
| Block head | aluminum 20v |
| Cylinder bore, mm | 82.5 |
| Piston stroke, mm | 92.8 |
| Compression ratio | 10.0 |
| Features | intercooler |
| Hydraulic lifters | yes |
| Timing drive | chain |
| Phase regulator | on both shafts |
| Turbocharging | BorgWarner K16 |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 6.5 |
| Fuel type | petrol |
| Euro standards | EURO 5 |
| Fuel consumption, L/100 km (for Audi RS Q3 2014) — city — highway — combined |
12.2 6.9 8.8 |
| Engine lifespan, km | ~230 000 |
The engine was installed on:
- Audi Q3 1 (8U) in 2013 – 2015.
Disadvantages of the Audi CTSA engine
- The timing chain serves quite a bit in the engine, sometimes it stretches to 100,000 km.
- The valves here are quickly overgrown with soot due to the presence of a direct injection system.
- The adsorber valve periodically fails and it is better to replace the entire assembly.
- The crankcase ventilation requires regular cleaning or it will clog and leak.
- Also, often grease can ooze from under the valve cover and timing side cover.
