The 2.5-liter Hyundai G4KN SmartStream 2.5 GDI engine has been assembled by the concern since 2019 and is installed on the Kia K5 and on the Hyundai Sonata and Grandeur models. This engine is equipped with two rows of nozzles for direct and distributed fuel injection.
Theta 2.5L family: G4KM, G4KN, G4KP, G4KR.
The engine was installed on:
- Hyundai Grandeur 6 (IG) since 2019;
- Hyundai Sonata 8 (DN8) since 2019;
- Kia K5 3 (DL3) since 2019;
- Kia Sportage 5 (NQ5) since 2021.
Specifications
| Production years | since 2019 |
| Displacement, cc | 2497 |
| Fuel system | GDi + MPI |
| Power output, hp | 194 |
| Torque output, Nm | 246 |
| Cylinder block | aluminum R4 |
| Block head | aluminum 16v |
| Cylinder bore, mm | 88.5 |
| Piston stroke, mm | 101.5 |
| Compression ratio | 13.0 |
| Features | DOHC |
| Hydraulic lifters | yes |
| Timing drive | chain |
| Phase regulator | on all shafts |
| Turbocharging | no |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 6.0 |
| Fuel type | petrol |
| Euro standards | EURO 5 |
| Fuel consumption, L/100 km (for Kia K5 2020) — city — highway — combined |
10.4 5.2 7.1 |
| Engine lifespan, km | ~250 000 |
Disadvantages of the Hyundai G4KN engine
- This motor began to be installed only recently and there are no statistics on its malfunctions yet;
- The presence of a second row of nozzles should eliminate the problem of valve coking;
- The catalyst is close to the block and its crumbs can get into the combustion chamber;
- The resource of the electronic thermostat and adjustable oil pump is still unknown;
- The engine is equipped with hydraulic compensators, which are picky about the quality of the lubricant.
