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 138 (JDM) and 140 (USDM) hp (103 (JDM) and 104 (USDM) kW) @ 6300 rpm and 128 lbf·ft (174 N·m) @4300 rpm SAE net (torque), with the redline at 6800 rpm. The R series is undersquare with a bore and stroke of 81 x 87.3 mm (stroke ratio of 0.93); it has a compression ratio of 10.5:1, features a "drive by wire" throttle system, and is quite economical, with its CARB ULEV-2 (Ultra Low Emissions Vehicle) rating, and 25/36 city/highway mpg (U.S. gallons) with automatic transmission. It also uses the same computer (ECU) controlled coil-on-plug ignition as the Honda K-series engines; it has no distributor. The R Series engine is new, and thus relatively little technical information has circulated so far. The OEM service manual is available at HELM INC.

[edit] R16

[edit] R16A

• Found in:
  • 2007- Honda Civic (Singapore Local Market FD4)
    • Displacement: 1595 cc
    • Compression: 10.5:1
    • Bore & stroke: 81.0 x 77.4 mm
    • Power: 123 bhp (125 PS, 93 kW) @ 6200 rpm Net horsepower
    • Torque: 15.6 kgf·m (151 N·m, 113 lbf·ft) @ 4200 rpm Net horsepower

[edit] R18

R18A

[edit] R18A1

• Found in:
  • 2006- Honda Civic (JDM FD1, USDM FA1, USDM FG1)
    • Displacement: 1799 cc
    • Compression: 10.5:1
    • Bore & stroke: 81.0 x 87.3 mm
    • Power: 138 bhp (140 PS, 103 kW) @ 6300 rpm (JDM Spec)
    • Torque: 17.7 kgf·m (174 N·m, 128 lbf·ft) @ 4300 rpm

[edit] R18A2

• Found in:
  • 2007- Honda Civic (EDM FN1, EDM FK2)
  • 2008- Honda CRV
    • Displacement: 1799 cc
    • Compression: 10.5:1
    • Bore & stroke: 81.0 x 87.3 mm
    • Power: 138 bhp (140 PS, 103 kW) @ 6300 rpm
    • Torque: 17.7 kgf·m (174 N·m, 128 lbf·ft) @ 4300 rpm

[edit] R20

[edit] R20A1

• Found in:
  • 2007- Honda Stream
  • 2007- Honda CRV
    • Displacement: 1997 cc
    • Compression: 10.5:1
    • Bore & stroke: 81.0 x 96.9 mm
    • Power: 148 bhp (150 PS, 110 kW) @ 6200 rpm
    • Torque: 19.4 kgf·m (190 N·m, 140 lbf·ft) @ 4200 rpm

[edit] External links

• Technical article on the Honda R-series R18A1
• Honda's New R18A Engine (Temple of VTEC Asia)
• SOHC i-VTEC on the R18A (Temple of VTEC Asia)
• Dyno Results the new 8G Asian Civic 1.8S (Temple of VTEC Asia)
• Honda Worldwide, Honda Develops New 1.8l i-VTEC Engine
• Honda Worldwide, New 1.8l i-VTEC Engine (Video)

[edit] See also

• Honda Engines