Honda 2.0L R20A/R20Z Engine Specs, Problems & Reliability
In 2007, Honda launched the 3rd gen Honda CR-V together with an R20A under the hood. Based on the Honda R-series i-VTEC SOHC engine, a new 2.0-liter four-cylinder gasoline power unit replaced the previous CR-V offering the K20A.
The R20A is a stroked version of the 1.8L R18A, and in terms of construction, both engines are basically similar. The 2.0L R20 has an aluminum open-deck cylinder block. Unlike the R18, the R20 engine block has a balancer shaft and additional casting for it. Inside the engine, there is a new crankshaft and shortened connecting rods (152.63 mm) due to the longer stroke (96.9 mm). Pistons are the same as the R18 has. Engines share the same aluminum 16-valve SOHC cylinder head with the i-VTEC system. The size of valves and ports was increased. The intake valve diameter is 33 mm, exhaust - to 26 mm. The diameter of the valve stem is 5.5 mm. Valves are actuated by one chain-driven camshaft via aluminum roller rocker arms. There are no hydraulic tappets in the R20 valve train.
The R20A features a variable intake manifold with 3 stages for achieving an overall better midrange torque/power delivery than the K20A. The Drive-By-Wire throttle body works together with Honda's i-VTEC system, offering excellent fuel economy during light throttle cruising conditions and optimized smooth torque curve in the crucial areas of the mid-range rpm band.
Engine Specs
10.6:1
Oil recommendations and capacity may vary depending on the car model, year, and market. Please check the service manual specific to your vehicle!
Honda 2.0 R20A Engine Problems and Reliability
This Honda's 2.0L R20A is very reliable, durable engine with only a few shortcomings. All small problems with different noises and sounds are common for R-series. You can read about them on the R18 review page. The R20 engine lifespan is more than 180,000 miles (300,000 km).
Modifications
R20A1 - 150 hp (110 kW) at 6,200 rpm, 140 lb-ft (190 Nm) at 4,200 rpm. Application: Honda CR-V, Honda Stream, Acura ILX.
R20A2 - 150 hp (110 kW) at 6,200 rpm, 140 lb-ft (190 Nm) at 4,200 rpm. This engine was used only in the Honda CR-V.
R20A3 - 150 hp (110 kW) at 6,300 rpm, 139 lb-ft (188 Nm) at 4,300 rpm. Application: Honda Accord and Proton Perdana.
R20Z1 - 155 hp (114 kW) at 6,500 rpm, 140 lb-ft (190 Nm) at 4,300 rpm. This engine has a compression ratio of 10.6:1. Application: Honda Civic, Honda Accord.