Toyota KR engine
| Company type | Internal combustion engine |
|---|---|
| Industry | Automotive |
| Headquarters | Japan, Poland |
| Products | Automobile engines (1KR-FE, 1KR-DE, 1KR-DE2, 1KR-VE, 1KR-VET, 1KR-B52) |
1KR-FE
The 1KR-FE is an engine manufactured in both Japan and Poland. It has a bore and stroke measuring , combined with a compression ratio of 10.5:1. Its power output varies between at 6000 rpm with torque at 4800 rpm, and at 6000 rpm with torque at 3600 rpm, capped by a redline at 6500 rpm. The initial versions complied with the European EU4 emission standards, producing CO2 emissions of 109 g/km, while subsequent updates achieved EU5 compliance, reducing emissions to as low as 99 g/km. This engine was honored with the International Engine of the Year award in the sub-1.0 liter category consecutively from 2007 through 2010.
Upgraded to fulfill EU6 emission requirements, the 1KR-FE attains CO2 emission figures as low as 88/89 g/km in vehicles such as the Toyota Aygo, Citroën C1, and Peugeot 108 since 2014 under the NEDC testing cycle.
Applications
- Daihatsu Boon/Toyota Passo/Daihatsu Sirion/Subaru Justy
- Toyota Aygo/Citroën C1 (2005–2021)
- Vitz/Yaris (XP90)/Vitz/Yaris (XP130)/Yaris (XP210) (2005–present)
- Toyota Belta (2006–2012)
- Toyota iQ (2008–2015)
- Daihatsu Cuore L276 (2007–2013)
- Peugeot 107 (2005–2014)
- Peugeot 108 (2014–2021)
- Daihatsu Thor/Toyota Tank/Toyota Roomy/Subaru Justy (2016–present)
1KR-DE
The 1KR-DE represents the non-VVT-i version of Daihatsu’s 1KR engine lineup, delivering power of at 6000 rpm and torque of at 3600 rpm. It maintains a bore and stroke of , resulting in the same displacement as its counterparts.
Created specifically for Indonesia’s Low Cost Green Car (LCGC) program to minimize production expenses, this engine incorporates a plastic-resin cylinder head cover to reduce weight. Its exhaust manifold is integrated with both the catalytic converter and oxygen sensor, which helps lower overall mass while enabling faster warm-up times, thereby decreasing emissions. This configuration achieves a weight reduction of .
Applications
- Daihatsu Ayla (2013–2023)
- Toyota Agya/Wigo (2013–2017)
- Daihatsu Hi-Max, derived from the tenth generation Hijet Truck (2016–2019)
1KR-DE2
The 1KR-DE2 is an upgraded iteration of the original 1KR-DE, reengineered by Perodua. It produces power rated at at 6000 rpm and torque of at 3600 rpm, sharing identical bore, stroke, and displacement specifications with the base model.
Compliant with Euro IV emission regulations, this variant enhances fuel economy through ECO Mode technology, which reportedly deactivates one cylinder every two cycles—effectively achieving fuel efficiency comparable to that of a engine. It features an increased compression ratio of 11:1.
Applications
- Perodua Axia (2014–2017)
1KR-VE
The 1KR-VE is a further refined version developed by Perodua, evolving from the foundation laid by the 1KR-DE2. Engineered for Perodua’s inaugural completely in-house vehicle—the Perodua Bezza—this compact and lightweight 1.0-liter VVT-i engine delivers improved fuel efficiency, enhanced performance, and reduced vibration and noise levels. It generates power output of at 6,000 rpm alongside torque of at 4,400 rpm, representing a slight increase over the Axia’s earlier 1KR-DE2 engine. Fuel consumption ratings stand at for manual transmissions and for automatic variants, marking a fuel economy improvement of approximately .
Significant enhancements include intake valve variable-valve timing with intelligence (VVT-i), an elevated compression ratio of 11.5:1, a high-tumble intake port design, an extended intake manifold length, micro fuel spray injection technology, and low-friction valve lifters—all contributing to greater efficiency and smoother power delivery.
Applications
- Perodua Bezza (2016–current)
- Daihatsu Sigra (2016–current)
- Perodua Axia (B200) (2017–current)
- Perodua Axia (A300) (2023–current)
- Toyota Wigo (B100) (2017–2023)
- Toyota Wigo (A350) (2023–current)
- Toyota Agya (2017–2021)
- Daihatsu Ayla (2023–current)
1KR-VET
The 1KR-VET is a turbocharged variant of the 1KR-FE engine, featuring a displacement of 996 cc, a lowered compression ratio of 9.5:1, and a maximum engine speed of 6,200 rpm. Produced by Daihatsu, this powerplant is utilized in higher-end vehicles such as the Daihatsu Thor, Toyota Tank, Toyota Roomy, and Subaru Justy, in addition to the Rocky/Toyota Raize lineup. It generates power between and torque within the range of , delivering improved driving dynamics for compact sport utility vehicles.
Applications
- Daihatsu Thor/Toyota Tank/Toyota Roomy/Subaru Justy (2016–current)
- Daihatsu Rocky/Toyota Raize (2019–current)
- Perodua Ativa (2021–current)
1KR-B52
This updated version of the engine has been employed in the PSA Citroën C1 and Peugeot 108 since 2016, initially appearing in the UrbanRide and Elle special editions of the Citroën C1 before becoming standard across all variants. The revision was made to comply with Euro 6.2 emission regulations, while boosting power output to and enhancing fuel efficiency to 58.8 mpg under the combined WLTP test cycle, with CO2 emissions maintained at 110 g/km.
Applications
- Citroën C1/Peugeot 108 (2016–2021)
- Toyota Aygo X (2022–2025)