The Honda R20A2 is a 1,997 cc, inline‑four naturally aspirated petrol engine produced between 2011 and 2015. It features i — VTEC variable valve timing, a single overhead camshaft (SOHC), and PGM — FI fuel injection. This engine delivers 110 kW (150 PS) and 190 Nm of torque, with i — VTEC enabling a broad, flat torque curve for responsive everyday drivability.
Fitted primarily to the ninth — generation Honda Civic (FB) for European and global markets, the R20A2 was engineered…
Honda
Production years 2011–2015 meet Euro 5 standards for all applicable markets (VCA UK Type Approval #VCA/EMS/8921).
The Honda R20A2 is a 1,997 cc inline‑four naturally aspirated petrol engine engineered for compact sedans and hatchbacks (2011-2015). It combines i-VTEC variable valve timing with PGM-FI fuel injection to deliver smooth, linear power delivery and strong low-end torque. Designed to meet Euro 5 standards, it balances urban agility with highway cruising capability.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,997 cc | |
Fuel type | Petrol | |
Configuration | Inline‑4, SOHC, 16‑valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 81.0 mm × 97.0 mm | |
Power output | 110 kW (150 PS) @ 6,500 rpm | |
Torque | 190 Nm @ 4,300 rpm | |
Fuel system | PGM-FI (Programmed Fuel Injection) | |
Emissions standard | Euro 5 | |
Compression ratio | 10.5:1 | |
Cooling system | Water‑cooled | |
Turbocharger | None | |
Timing system | Chain-driven | |
Oil type | Honda 5W-30 or 0W-20 (API SN/RC) | |
Dry weight | 128 kg |
The Honda R20A2 was used across Honda's Global Compact platform with transverse mounting. This engine received platform-specific adaptations-unique engine mounts for the Civic-creating minor service part variations. All adaptations are documented in OEM technical bulletins.
The R20A2's primary reliability risk is premature exhaust camshaft lobe wear, with elevated incidence in high-mileage or sustained high-load vehicles. Honda internal service data indicated a measurable rate of performance complaints linked to this issue, while owner forums frequently report it on vehicles exceeding 120,000 km. Extended oil change intervals and aggressive driving make adherence to the updated service bulletin critical.
Analysis derived from Honda technical bulletins (2012-2015) and aggregated owner-reported failure data (2011-2023). Repair procedures should follow manufacturer guidelines.
The most common questions about engine codes, what they mean, how to find them and how this database works
The R20A2 is generally robust, but early engines (pre-2013) are susceptible to exhaust camshaft lobe wear, leading to performance issues. Later models and those repaired per SIB A14-009 are very reliable. Regular oil changes with the correct specification are paramount for longevity, especially for vehicles used for spirited driving.
The most documented issues are premature exhaust camshaft lobe wear, VTC actuator rattle on cold starts, PCV valve clogging causing oil leaks, and coolant leaks from the water pump. These are covered in Honda service bulletins and widely reported in technical forums.
The R20A2 was used exclusively in the ninth-generation Honda Civic (FB, 2011-2015) for European and global markets. It was not used in North American or Japanese Domestic Market (JDM) vehicles, which received different engine variants like the K20.
Tuning potential is limited due to its naturally aspirated, SOHC design. ECU remaps can yield minor gains (5-10 kW) by optimizing ignition and fuel curves. Significant power increases require forced induction, which is complex and costly. Most owners focus on maintenance for reliability rather than performance upgrades.
Good for its class. In the Honda Civic, expect ~7.5 L/100km (city) and ~5.5 L/100km (highway), or about 42 mpg UK combined. Real-world figures are highly dependent on driving style and vehicle condition.
Yes. The R20A2 is an interference engine. If the timing chain were to fail (an extremely rare event), the pistons would collide with the open valves, causing catastrophic internal damage. Fortunately, the timing chain is designed to last the engine's lifetime with proper oil maintenance.
Honda recommends 5W-30 synthetic oil for optimal protection. 0W-20 is also acceptable for improved fuel economy. The oil must meet API SN/RC or ACEA A5/B5 specifications. Changing oil every 10,000 km or 12 months is critical to prevent camshaft and VTC actuator issues.
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Regulation (EC) No 715/2007
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