Honda 2.0L R20A/R20Z Engine: Specs, Problems, Reliability. In 2007, Honda launched the 3rd gen Honda CR-V in addition to 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 1.8 L R18A, and in terms of construction, both engines are basically similar. The 2.0 L 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 dimension of the valve stem is 5.5 mm. Valves are egged on by one chain-driven camshaft via aluminum roller rocker arms. There are no hydraulic tappets in the R20 valve train.
The R20A includes an adjustable intake manifold with 3 stages for achieving an overall better midrange torque/power delivery than the K20A. The Drive-By-Wire throttle body collaborates 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.
Honda 2.0 R20A Engine Problems and Reliability
This Honda’s 2.0 L R20A is very trustworthy, durable engine with a few shortcomings. All small problems with different noises and sounds are common for R-series. You can review them on the R18 review page. The R20 engine lifespan is more than 180,000 miles (300,000 km).
Honda 2.0L R20A/R20Z Engine Modifications
R20A1 – 150 hp (110 kW) at 6,200 rpm, 140 lb-ft (190 Nm) at 4,200 rpm. Request: 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. Use: 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 setting ratio of 10.6:1. Application: Honda Civic, Honda Accord.
Honda 2.0L R20A/R20Z Engine: Specs
|Manufacturer||Honda Motor Company|
|Cylinder block material||Aluminum|
|Cylinder head material||Aluminum|
|Fuel system||Multi-point fuel injection|
|Number of cylinders||4|
|Valves per cylinder||4|
|Bore, mm||81.0 mm (3.19 in)|
|Stroke, mm||96.9 mm (3.81 in)|
|Displacement, cc||1,997 cc (121.9 cu in)|
|Type of internal combustion engine||Four-stroke, naturally aspirated|
|Power, hp||150-155 hp (110-114 kW) / 6,200-6,500|
|Torque, lb ft||139-140 lb-ft (190-188 Nm) / 4,200-4,300|
|Engine oil weight||SAE 0W-20, 5W-20|
|Engine oil capacity, liter||3.7 l (4.0 qt)|
|Oil change interval, mile||9,000 (15,000 km) / 12 months|
|Applications||Honda CR-V, Honda Accord, Honda Civic, Honda Stream, Acura ILX, Proton Perdana|