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.
EA855 family: 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 |
| Weight, kg | 183 |
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.
Frequently asked questions about the Audi CTSA
How much power does the Audi CTSA make?
The Audi CTSA develops 310 hp and 420 Nm of torque.
How much oil does the Audi CTSA take and which one?
Engine oil capacity: 6.5 liters. Recommended oil: 5W-30.
Does the Audi CTSA have a timing belt or chain?
The Audi CTSA uses a timing chain.
Is the Audi CTSA turbocharged?
Yes, the Audi CTSA is turbocharged (BorgWarner K16).
Does the Audi CTSA need valve clearance adjustment?
No, the Audi CTSA has hydraulic lifters, so the valve clearances do not need to be adjusted.
How long does the Audi CTSA last?
The typical lifespan of the Audi CTSA is ~230 000 km with proper maintenance.
What is the fuel consumption of the Audi CTSA?
Audi RS Q3 2014: city 12.2, highway 6.9, combined 8.8 L/100 km.
What cars was the Audi CTSA installed on?
Audi Q3 1 (8U) in 2013 - 2015.
What are the common problems of the Audi CTSA?
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. All known problems.
