Honda R engine

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R20A

The Honda R series inline four cylinder engine is new for the 2006 Honda Civic (Non-Si). It is fuel injected, has an aluminum-alloy cylinder block and cylinder head, is a SOHC 16 valve design (4 valves per cylinder), utilizes Honda's i-VTEC system, and produces Template:Convert/hp in Japanese-market form, Template:Convert/hp in American-market configuration, at 6300 rpm. Torque is 128 lb·ft (174 N·m), with the redline at 6800 rpm. The R series is undersquare with a bore and stroke of Template:Convert/Dual/LoffAonDbSoff (stroke ratio of 0.93); it has a high compression ratio of 10.5:1, features a "drive by wire" throttle system which is computer controlled to reduce pumping losses and create a smooth torque curve. The engine uses many technologies to improve economy. Piston rings are given an ion plating, weight is reduced with plastic and aluminum parts and variable length intake manifolds that maintain ram air at a wide rpm range. The automatic transmission model is rated at CARB ULEV-2 (Ultra Low Emissions Vehicle) with 25/36 city/highway mpg (U.S. gallons) or 30/43 city/hwy mpg (imperial gallons) . It also uses the same computer (ECU) controlled coil-on-plug ignition as the Honda K-series engines; it has no distributor.

R16

R16A

R18

R18A

R18A1

R18A2

R20

R20A1

R20A2

External links

References

See also