The Hyundai R engine is a diesel 4-cylinder automobile engine produced by Hyundai Motor Group, it was announced during the Advanced Diesel Engine Technology Symposium in November 2008 and began production in 2009. The R line of engines feature four cylinders compacted graphite iron block and aluminum cylinder head unit, with chain driven dual overhead camshafts operating four valves per cylinder. Fuel is supplied to the unit using Bosch 3rd-generation common rail direct injection (CRDi) through piezoelectric Bosch injectors operating at 1800 bar, with air being fed through an electronically managed variable geometry turbocharger and an advanced engine control unit (air system-based charge control). For reduced vibration and lower booming noise, the R gets a lower balancer shaft which is encased in a stiffened ladder frame housing for increased rigidity. Weight saving features include a serpentine belt with isolation pulley, a plastic head cover, plastic intake manifold and plastic oil filter housing. To achieve Euro 5 emission compliancy, the R is fitted with a close-coupled Diesel particulate filter plus highly efficient exhaust gas recirculation with by-pass valve.

2.0 L (D4HA)

The D4HA Bore and Stroke are 84x90 mm for a total displacement of 1995 cc. It generates 184 - 186 PS of power at 4,000 rpm and 40 - 41 kgm of torque between 1,750 and 2,750 rpm.

2.2 L (D4HB)

Bore and Stroke are 85.4x96 mm for a total displacement of 2199 cc. The D4HB generates 193 - 200 PS of power at 3,800 rpm and 44.5 - 45 kgm of torque between 1,750 and 2,750 rpm. A detuned version that makes 177 PS of power at 3,800 rpm and 44.5 kgm of torque between 1,500 and 2,500 rpm is also available.

2.2 L FR (D4HC)

Bore and Stroke are 85.4x96 mm for a total displacement of 2199 cc. For RWD based applications, the D4HC generates 202 PS of power and 45 kgm of torque between 1,750 and 2,750 rpm.