The Hyundai U engine is a series of three or four-cylinder diesel engines made for automotive applications by the Hyundai Kia Automotive Group. The U series of engines includes the smallest automotive diesel engines produced by Hyundai.
The 1.6-litre U diesel engine (known as D4FB) from the Žilina (Slovakia) Kia factory is a bored-out version of the 1.5-litre U series engine (77.2 mm versus 75 mm) and is used in the KIA Cerato 1.6CRDi, KIA Cee'd 1.6CRDi, Kia Soul and Hyundai i30 models. It develops 89 hp (66 kW; 90 PS) or 113 hp (84 kW; 115 PS) and 173 lb·ft (235 N·m) or 188 lb·ft (255 N·m) of torque, dependent on the vehicle application and was the "best in class" diesel engine in the world till now and present time. In 2009, it was refined to the 1.6 U2 version, with a new displacement, developing 126 hp (94 kW; 128 PS) and 195 lb·ft (264 N·m) of torque