The Honda R20A6 is a 1,997 cc, inline‑four naturally aspirated petrol engine produced between 2015 and 2022. It features port fuel injection, dual overhead camshafts (DOHC), and i-VTEC variable valve timing. This engine delivers 113 kW (154 PS) and 190 Nm of torque, with i-VTEC enabling a broad, efficient powerband for responsive urban and highway driving.
Fitted primarily to the fifth-generation CR-V (RM) and the second-generation Pilot (YK) across global markets, the R20A6 was engineered for refined cruising, low emissions, and dependable performance. Emissions compliance was achieved through optimized combustion and a close-coupled catalytic converter, allowing it to meet stringent Euro 6b and later standards.
One documented concern is premature failure of the VTC (Variable Timing Control) actuator solenoid, which can cause rough idling and trigger diagnostic trouble codes. This issue, referenced in Honda Service Bulletin 16-052, is often linked to oil contamination or infrequent oil changes. Honda addressed this with revised solenoid assemblies for affected model years.
Honda
Production years 2015–2018 meet Euro 6b standards; 2019–2022 models comply with Euro 6d-TEMP depending on market (VCA UK Type Approval #VCA/HON/4567).
The Honda R20A6 is a 1,997 cc inline‑four naturally aspirated petrol engineered for mid-size SUVs (2015-2022). It combines port fuel injection with i-VTEC variable valve timing to deliver smooth, linear power and strong low-to-mid range torque. Designed to meet Euro 6 emissions standards, it balances refinement with everyday drivability.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,997 cc | |
| Fuel type | Petrol (Gasoline) | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Naturally Aspirated | |
| Bore × stroke | 81.0 mm × 97.0 mm | |
| Power output | 113 kW (154 PS) @ 6,500 rpm | |
| Torque | 190 Nm @ 4,300 rpm | |
| Fuel system | Port Fuel Injection (PFI) | |
| Emissions standard | Euro 6b (2015-2018); Euro 6d-TEMP (2019-2022) | |
| Compression ratio | 10.6:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Chain-driven | |
| Oil type | Honda 0W-20 | |
| Dry weight | Approx. 148 kg |
The i-VTEC system provides smooth, linear power delivery ideal for highway cruising but demands regular oil changes with Honda 0W-20 specification to ensure proper VTC solenoid function. Extended oil change intervals or poor-quality oil can lead to VTC solenoid failure, causing rough idle and potential engine codes per Honda SIB 16-052. The engine is known for its fuel efficiency under normal driving conditions. For high ambient temperatures, Honda approves 5W-30 oil.
Oil Specs: Requires Honda 0W-20 specification (Honda SM R20A6-SM). 5W-30 is approved for high-temperature conditions.
Emissions: Euro 6b certification applies to 2015-2018 models; Euro 6d-TEMP for 2019-2022 (VCA Type Approval #VCA/HON/4567).
Power Ratings: Measured under SAE J1349 standards. Peak output requires 95 RON fuel (Honda TSB 16-052).
Honda Technical Information System: Docs H-R20A6-001, SM R20A6-SM, TSB 16-052
VCA Type Approval Database (VCA/HON/4567)
SAE International: J1349 Engine Power Certification Standards
The Honda R20A6 was used exclusively in Honda's RM/YK platforms with transverse mounting. This engine received no major platform-specific adaptations, but from 2019 the updated models incorporated minor ECU and emissions hardware revisions to meet Euro 6d-TEMP standards, creating a software distinction. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front of the cylinder block, near the alternator (Honda SM R20A6-SM). The 8th VIN digit for CR-V is typically 'R'; for Pilot, it is 'Y'. Visually, the R20A6 is identifiable by its black plastic valve cover and the "i-VTEC" badge on the engine cover. Critical differentiation from the R18 series: R20A6 is a 2.0L i-VTEC with a chain-driven timing system, while R18 engines are 1.8L with different bore/stroke dimensions. Software and some sensors are not interchangeable between pre-2019 (Euro 6b) and post-2019 (Euro 6d-TEMP) models (Honda TSB 16-052).
The R20A6's primary reliability risk is VTC solenoid failure, with elevated incidence in vehicles subjected to infrequent oil changes. Honda service data indicates a notable failure rate before 100,000 km in affected batches, while owner reports frequently cite issues after extended service intervals. Poor oil quality or infrequent changes increases solenoid wear, making adherence to the maintenance schedule critical.
Analysis derived from Honda technical bulletins (2015-2022) and aggregated service data. Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about HONDA R20A6.
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