Engine Hyundai G4NN

The 2.0-liter Hyundai G4NN or Smartstream G 2.0 T-GDI engine has been produced since 2019 and is installed on Chinese versions of such models as Custo, Sonata, as well as Kia K5 and Carnival. This turbo engine is found on some concern cars for other Asian countries.

The Nu family includes engines: G4NB, G4NA, G4NC, G4ND, G4NE, G4NH, G4NG, G4NL, G4NN.


Production years since 2019
Displacement, cc 1975
Fuel system direct injection
Power output, hp 233 – 240
Torque output, Nm 353
Cylinder block cast iron R4
Block head aluminum 16v
Cylinder bore, mm 80.5
Piston stroke, mm 97
Compression ratio 10.0
Features ISG
Hydraulic lifters yes
Timing drive chain
Phase regulator Dual CVVT
Turbocharging yes
Recommended engine oil 0W-20
Engine oil capacity, liter 5.0
Fuel type petrol
Euro standards EURO 6
Fuel consumption, L/100 km (for Kia K5 2021)
— city
— highway
— combined
Engine lifespan, km ~220 000
Weight, kg 121

The engine was installed on:

  • Hyundai Custo 1 (KU) since 2021;
  • Hyundai Sonata 8 (DN8) since 2019;
  • Kia Carnival 4 (KA4) since 2021;
  • Kia K5 3 (DL3) since 2020.

Disadvantages of the Hyundai G4NN engine

  • On specialized forums, it is mainly praised and scolded only by the Start-Stop system.
  • Like all direct injection engines, it suffers from carbon deposits on the intake valves.
  • Also, for engines of this line, the timing chain does not have a very high resource.

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