The Nissan KR20DDET is a 1,997 cc, inline‑four turbo‑petrol engine produced since 2021. It features a variable compression ratio (VC-Turbo), dual overhead camshafts (DOHC), 16 valves, and direct fuel injection, delivering 205 kW (279 PS) and 380 Nm of torque. This world-first production variable compression technology dynamically adjusts the compression ratio between 8:1 (for power) and 14:1 (for efficiency) based on driving conditions.
Exclusively engineered for the Qashqai e-POWER and X-Trail e-POWER, the KR20DDET acts as a generator rather than directly driving the wheels, prioritizing smooth, quiet operation and maximum thermal efficiency. Emissions compliance for global markets is achieved through precise direct injection and a close-coupled catalytic converter, meeting Euro 6d standards from launch.
One documented operational characteristic is sensitivity to fuel quality, with Nissan Technical Bulletin NTB‑22‑015 advising that prolonged use of fuel below 95 RON may trigger reduced power mode and illuminate the check engine light. This is due to the engine’s high specific output and reliance on precise knock control to manage the variable compression mechanism.
Nissan
Production years 2021–2025 meet Euro 6d emissions standards for all applicable markets (VCA UK Type Approval #VCA/EMS/8765).
The Nissan KR20DDET is a 1,997 cc inline-four turbocharged petrol engine with variable compression ratio, engineered for hybrid e-POWER applications (2021-2025). It combines direct fuel injection with a single turbocharger and an innovative multi-link piston system to vary compression ratio on the fly. Designed to meet stringent Euro 6d standards, it prioritizes efficiency and smooth generator operation over raw performance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,997 cc | |
| Fuel type | Petrol | |
| Configuration | Inline-4, DOHC, 16-valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 84.0 mm × 90.1 mm | |
| Power output | 205 kW (279 PS) | |
| Torque | 380 Nm @ 2,800–4,400 rpm | |
| Fuel system | Direct Injection (DI) | |
| Emissions standard | Euro 6d | |
| Compression ratio | 8:1 – 14:1 (Variable) | |
| Cooling system | Water-cooled | |
| Turbocharger | Single turbo (IHI or Mitsubishi Heavy Industries) | |
| Timing system | Chain-driven | |
| Oil type | 0W-20 (API SP or equivalent) | |
| Dry weight | 203 kg |
The variable compression system provides exceptional efficiency for a generator but requires strict adherence to 0W-20 synthetic oil and 95 RON minimum fuel to prevent knock and protect the multi-link mechanism. Oil changes must be performed every 10,000 km or 12 months. The engine’s role as a generator means it operates under unique load profiles; prolonged high-RPM operation is uncommon, reducing thermal stress. Nissan TIS KR20-007 notes that the variable compression actuator is sealed for life and not serviceable.
Oil Specs: Requires 0W-20 full synthetic oil meeting API SP specification (Nissan Owner's Manual 2023).
Emissions: Meets Euro 6d standards for all model years and markets (VCA Type Approval #VCA/EMS/8765).
Power Ratings: Measured under JIS D 1001 standards. Output is consistent across all applications (Nissan TIS Doc. KR20-010).
Nissan Technical Information System (TIS): Docs KR20-001, KR20-003, KR20-005, KR20-007, NTB-22-015
VCA Type Approval Database (VCA/EMS/8765)
Japanese Industrial Standards: JIS D 1001 Engine Power Measurement
The Nissan KR20DDET was used exclusively in Nissan's e-POWER hybrid system with transverse mounting. This engine is not mechanically connected to the wheels; it functions solely as a generator. Its design is specific to the e-POWER architecture, making it incompatible with conventional powertrains. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front of the cylinder block, near the alternator (Nissan TIS KR20-001). The 8th VIN digit for KR20DDET-equipped e-POWER models is typically 'K'. Visually, the engine is identifiable by its compact design, lack of a traditional starter motor (uses an integrated starter-generator), and the prominent variable compression ratio actuator mounted on the right side of the block. Critical differentiation from conventional engines: KR20DDET has no mechanical connection to the transmission and features unique engine mounts and ancillaries for the e-POWER system.
The KR20DDET's primary operational risk is fuel quality sensitivity, with elevated incidence of power reduction events when sub-95 RON fuel is used consistently. Nissan internal quality reports from 2022 noted a correlation between low-octane fuel and knock sensor activity, triggering protective engine modes. While no widespread mechanical failures are documented, adherence to fuel and oil specifications is critical for long-term reliability.
Analysis derived from Nissan technical bulletins (2021-2025) and aggregated owner reports (2022-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about NISSAN KR20DDET.
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