Engine Audi CTSA

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.


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
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.

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