The HR is a family of straight-3 12-valve and straight-4 16-valve automobile engines with continuously variable valve timing, involving development by Nissan (Aichi Kikai) and/or Renault, and also Mercedes-Benz in the case of the H5Ht/M282. The designation of H engine is used by Renault, and M28x by Mercedes-Benz, to classify the family. There are three basic specifications of engine involving variations in engine architecture, or all-new architecture, with 72.2 mm, 75.5 mm and 78 mm bore diameter.

78 mm series (2004-)

HR10DE

The HR10DE is a 999 cc naturally aspirated straight-three engine. Bore: 78 mm; Stroke 69.7 mm; 12v DOHC. It produces 56.6 kW and 98 Nm. Flex-Fuel, gasoline (E22) or ethanol (E100). Compression ratio of 11.2:1. It is fitted to the following vehicles:

HR12DE

The HR12DE is a 1198 cc naturally aspirated straight-three engine. Bore: 78 mm; Stroke 83.6 mm; 12-valve DOHC; EFI with variable valve timing. It produces 59 kW and 108 Nm. It is fitted to the following vehicles:

HR14DET (Renault H4Jt)

1397 cc, 96 kW (130 PS) at 5500 rpm, 190 Nm at 2250 rpm. Bore: 78 mm; Stroke 73.1 mm.

HR14DDe

The HR14DDe is a 1433 cc naturally aspirated straight-3 engine. Bore: 78 mm; Stroke 100 mm; 12v DOHC; direct injection with variable valve timing. It produces 72 kW at 5,600 rpm and 123 Nm. Purposely, this engine is only built as a power generator for the electric motor.

HR15DE (Renault H4K)

The HR15DE is a 1498 cc naturally aspirated straight-4 engine. Bore: 78 mm; Stroke 78.4 mm; 16 valve DOHC; EFI with variable valve timing. It produces 100 PS kW at 6000 rpm and 134.4 Nm at 4000 rpm and is fitted to the following vehicles:

HR16DE (Renault H4M)

The HR16DE is a 1598 cc naturally aspirated gasoline straight-4 engine, 16 valve DOHC; EFI; with variable valve timing. This engine has two fuel injectors per cylinder to improve fuel economy and reduce emissions. Bore: 78 mm; Stroke 83.6 mm. It produces 105 to 119 PS kW and 158 Nm at 4000 rpm. A new version (still 8 Cycle) has been released to equip Renault hybrids (E-Tech), it produces 91 PS kW at 5600 rpm and 144 Nm at 3200 rpm. It is fitted to the following vehicles:

DE engine updates (2006–present)

Changes include: The improved HR15DE engines were first used in Nissan Cube, Nissan Cube Cubic, Nissan Note, Nissan Tiida, Nissan Tiida Latio and Nissan Wingroad sold since December 25, 2006.

HR12DDR

The HR12DDR is a 1198 cc supercharged straight-3 engine, equipped with timing chain and direct injection. The engine dimensions are the same as for the HR12DE. It produces 72 kW and 143 Nm. Designed for small-car applications, this gasoline engine incorporates a variety of technologies to minimize Carbon dioxide emissions while providing practical levels of power output. Some of the pertinent features are: It is fitted to the following vehicles:

75.5 mm series

HR12DDV (Renault HR12)

The HR12DDV is a 1199 cc all-aluminium direct injected and variable geometry turbocharged straight-three engine 48V mHEV equipped with lifetime timing chain, 12v DOHC, VVT, variable displacement oil pump, electric driven water pump, with Bore Spray Coating, Stop-Start, and regenerative braking, Bore and stroke are 75.5 and 89.3 mm respectively. It produces between 130 hp-metric with 205 Nm for the E-Tech version; 230 Nm for normal version, to 150 hp-metric with 230 Nm depending on the application. Renault marketing names for these engines are TCe 130, TCe 150 (on the Grand Austral) and E-Tech 200. It is fitted to the following vehicles:

72.2 mm series

HR12DDT / HRA2 (Renault H5Ft)

The HR12DDT is a 1197 cc all-aluminium direct injected and turbocharged straight-four engine equipped with lifetime timing chain, 16v DOHC, VVT, variable displacement oil pump, Stop-Start and regenerative braking, Bore: 72.2 mm, Stroke 73.1 mm. It produces two choices, 85 kW at 4500 or 5000 or 6000 rpm with 190 Nm at 1900–4000 rpm and 97 kW at 5000–5500; rpm with 205 Nm at 2000–3000 rpm depending on the application. Renault marketing names for these engines are TCe115, TCe120, TCe125, and TCe130. It is fitted to the following vehicles: This engine has been plagued by abnormal oil consumption.

HR10DE (Renault H4D)

The HR10DE is a 999 cc multi point injected, naturally aspirated, straight-3 engine. It produces 45 to 52 kW at 6000 rpm and 91 Nm at 2850 rpm.

HR09DET (Renault H4Bt)

The H4Bt is a 898 cc multi point injected, turbocharged, straight-3 engine. It produces 66 kW at 5500 rpm and 135 to 140 Nm at 2250–2500 rpm. A 110hp version was available in the Twingo GT (2016-2018).

HR13DDT (Renault H5Ht / Mercedes-Benz M282)

The HR13DDT is a 1332 cc all-aluminium direct injected and turbocharged straight-four engine equipped with lifetime timing chain, 16v DOHC, VVT, variable displacement oil pump, Stop-Start, regenerative braking, and Bore Spray Coating system (as installed in Nissan GT-R models), Bore: 72.2 mm, Stroke 81.3 mm. There are three different versions: 85 kW at 4500 rpm with 220 Nm at 1500–3500 rpm, 103 kW at 5000 rpm with 240 Nm at 1600–3600 rpm, and 117 kW at 5500 rpm with 270 Nm at 1800–3500 rpm depending on the application. Renault brands for these engines are TCe115, TCe140 and TCe160. This engine tests WLTP proof (Euro 6c). This engine is also rebranded as a Mercedes-Benz under the name "M282", adding cylinder deactivation technology. It is fitted to the following vehicles:

HR10DET / HRA0 (Renault H4Dt)

The HR10DET is a 999 cc multi point injected, turbocharged, straight-three engine with a 72.2 mm bore and a 81.3 mm stroke. It produces 100 PS at 5000 rpm and 160 Nm at 1750 rpm. This engine is also available as a LPG version. Maximum power is unchanged but torque is 170 Nm at 2000 rpm.

HR10DDT / HRA1 / Renault H5Dt

The HR10DDT is a 999 cc direct injected, turbocharged, straight-3 engine. It produces 85 or at 5000 rpm or 5250 rpm and 200 Nm at 2750 rpm or 180 to 200 Nm at 1750–4000 rpm.