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 , and bore diameter. 78 mm series No Daimler involvement three- and four-cylinder layouts, multi point fuel injection except HR12DDR and HR14DDe with direct fuel injection most engines naturally aspirated with few exceptions being supercharged or turbocharged introduced in 2002 on Nissan Cube Z11 HR10DE The HR10DE is a naturally aspirated straight-3 engine. Bore: ; Stroke ; 12v DOHC. It produces and . Flex-Fuel, gasoline (E22) or ethanol (E100). Compression ratio of 11.2:1. It is fitted to the following vehicles: 2015 Nissan March K13 (Brazil) 2015 Nissan Versa N17 (Brazil) HR12DE The HR12DE is a naturally aspirated straight-three engine. Bore: ; Stroke ; 12-valve DOHC; EFI with variable valve timing. It produces and . It is fitted to the following vehicles: 2010 Nissan Micra 2010 Nissan Almera (Thailand) 2012 Nissan Note 2014 Datsun Go/Datsun Go+ () 2019 Datsun Go/Datsun Go+ CVT () 2018 Nissan Serena e-Power (Japan) 2020 Nissan Kicks e-Power 2021 Nissan Sylphy e-Power (China) 2021 Nissan Note e-power HR14DET (Renault H4Jt) 1397 cc, 96 kW at 5500 rpm, 190 Nm at 2250 rpm. Bore: ; Stroke . 2009–2013 Renault Megane III 2009–2013 Renault Scénic III HR14DDe The HR14DDe is a naturally aspirated straight-3 engine. Bore: ; Stroke ; 12v DOHC; direct injection with variable valve timing. It produces at 5,600 rpm and . Purposely, this engine is only built as a power generator for the electric motor. 2022–present Nissan Serena e-Power HR15DE (Renault H4K) The HR15DE is a naturally aspirated straight-4 engine. Bore: ; Stroke ; 16 valve DOHC; EFI with variable valve timing. It produces at 6000 rpm and at 4000 rpm and is fitted to the following vehicles: 2002–2020 Nissan Cube Z11/12 2004–2012 Nissan Note E11 2004–2012 Nissan Tiida C11 2005–2012 Nissan Bluebird Sylphy G11 2005–present Nissan Micra/March K12/13/14 2006–present Nissan NV150 AD Van/Wingroad NY12 2006–2019 Nissan Livina/Grand Livina L10/11 2007–2019 Mitsubishi Lancer Cargo/Mazda Familia Van NY12 (Japan) 2009–2018 Nissan Evalia (Indonesia) 2010–2019 Nissan Juke F15 (Japan and Indonesia) 2011–present Nissan Almera/Latio/Sunny N17/18 2012–2017 Renault Scala N17 2015–present