Honda 2.0L R20A/R20Z Engine: Specs, Problems, Reliability

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.

Honda 2.0L R20A R20Z Engine Specs, Problems

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.

Honda 2.0L R20A/R20Z Engine: Specs, Problems, Reliability

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
Production years 2007-present
Cylinder block material Aluminum
Cylinder head material Aluminum
Fuel type Gasoline
Fuel system Multi-point fuel injection
Configuration Inline
Number of cylinders 4
Valves per cylinder 4
Valvetrain layout SOHC
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
Compression Ratio 10.5:1;
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 weight
Firing order 1-3-4-2
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
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