Honda R engine - AbsoluteAstronomy.com

The Honda R engine is an inline-four engine launched in 2006 for the Honda Civic

Honda Civic

The Honda Civic is a line of subcompact and subsequently compact cars made and manufactured by Honda. The Civic, along with the Accord and Prelude, comprised Honda's vehicles sold in North America until the 1990s, when the model lineup was expanded...

(Non-Si). It is fuel injected, has an aluminum-alloy

Alloy

An alloy is a mixture or metallic solid solution composed of two or more elements. Complete solid solution alloys give single solid phase microstructure, while partial solutions give two or more phases that may or may not be homogeneous in distribution, depending on thermal history...

cylinder block

Cylinder block

A cylinder block is an integrated structure comprising the cylinder of a reciprocating engine and often some or all of their associated surrounding structures...

and cylinder head

Cylinder head

In an internal combustion engine, the cylinder head sits above the cylinders on top of the cylinder block. It closes in the top of the cylinder, forming the combustion chamber. This joint is sealed by a head gasket...

, is a SOHC 16-valve

Poppet valve

A poppet valve is a valve consisting of a hole, usually round or oval, and a tapered plug, usually a disk shape on the end of a shaft also called a valve stem. The shaft guides the plug portion by sliding through a valve guide...

design (four valves per cylinder) and utilizes Honda's i-VTEC system. The R series engine has a compression ratio

Compression ratio

The 'compression ratio' of an internal-combustion engine or external combustion engine is a value that represents the ratio of the volume of its combustion chamber from its largest capacity to its smallest capacity...

of 10.5:1, features a "drive by wire

Electronic throttle control

Electronic throttle control is an automobile technology which severs the mechanical link between the accelerator pedal and the throttle. Most automobiles already use a throttle position sensor to provide input to traction control, antilock brakes, fuel injection, and other systems, but use a...

" 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 manifold

Variable Length Intake Manifold

In internal combustion engines, a variable length intake manifold , or variable intake manifold is an automobile internal combustion engine manifold technology...

s that maintain ram air at a wide rpm range. The automatic transmission model is rated at California Air Resources Board

California Air Resources Board

The California Air Resources Board, also known as CARB or ARB, is the "clean air agency" in the government of California. Established in 1967 in the Mulford-Carrell Act, combining the Bureau of Air Sanitation and the Motor Vehicle Pollution Control Board, CARB is a department within the...

(CARB) ULEV-2 (Ultra Low Emissions Vehicle) with fuel economy 25 mpgU.S. (10.6 km/L) city, and 36 mpgU.S. (15.3 km/L) highway. It also uses the same computer (engine control unit

Engine control unit

An engine control unit is a type of electronic control unit that determines the amount of fuel, ignition timing and other parameters an internal combustion engine needs to keep running...

) controlled distributorless coil-on-plug ignition

Ignition system

An ignition system is a system for igniting a fuel-air mixture. Ignition systems are well known in the field of internal combustion engines such as those used in petrol engines used to power the majority of motor vehicles, but they are also used in many other applications such as in oil-fired and...

as the Honda K-series

Honda K engine

The Honda K series engine is a four-cylinder four-stroke engine introduced in 2001. The K series engines are equipped with DOHC valvetrains and use roller rockers to reduce friction. The engines use a coil-on-plug, distributorless ignition system with a coil for each spark plug...

engines.

R16A

Found in:
- 2007- Honda Civic
  Honda Civic
  The Honda Civic is a line of subcompact and subsequently compact cars made and manufactured by Honda. The Civic, along with the Accord and Prelude, comprised Honda's vehicles sold in North America until the 1990s, when the model lineup was expanded...
  
  (Singapore Local Market FD4, Egypt, Turkey, Cyprus)
  - Displacement: 1595 cc
  - Compression: 10.5:1
  - Bore & stroke: 81 by 77.4 mm (3.2 by 3 in)
  - Power: 125 PS @ 6,200 rpm Net horsepower
  - Torque: 15.6 kgf
    KGF
    KGF may refer to:*Keratinocyte Growth Factor*King George's Fields A UK set of 471 memorial playing fields and recreation grounds*Kolar Gold Fields*The IATA code for Sary-Arka Airport, Karaganda, Kazakhstan...
    
    ·m (151 N·m (111.4 ft·lbf)) @ 4,200 rpm Net

R18A1

Found in:
- 2006+ Honda Civic
  Honda Civic
  The Honda Civic is a line of subcompact and subsequently compact cars made and manufactured by Honda. The Civic, along with the Accord and Prelude, comprised Honda's vehicles sold in North America until the 1990s, when the model lineup was expanded...
  
  (JDM FD1, American/Canadian-market FA1 and FG1)
  - Displacement: 1799 cc
  - Compression: 10.5:1
  - Bore & stroke: 81 by 87.3 mm (3.2 by 3.4 in)
  - Power: 140 PS @ 6300 rpm (Japanese Spec)
  - Torque: 17.7 kgf·m (174 N·m (128.3 ft·lbf)) @ 4,300 rpm
  - VTEC for economy 1,500-3,000 rpm

R18A2

Found in:
- 2007- Honda Civic
  Honda Civic
  The Honda Civic is a line of subcompact and subsequently compact cars made and manufactured by Honda. The Civic, along with the Accord and Prelude, comprised Honda's vehicles sold in North America until the 1990s, when the model lineup was expanded...
  
  (European-market FN1 & FK2)
  - Displacement: 1799 cc
  - Compression: 10.5:1
  - Bore & stroke: 81 by 87.3 mm (3.2 by 3.4 in)
  - Power: 140 PS @ 6,300 rpm
  - Torque: 17.7 kgf·m (174 N·m (128.3 ft·lbf)) @ 4,300 rpm
  - VTEC window: 4,800 rpm

R20A1

Found in:
- 2007- Honda CR-V (RE1, RE2)
  - Displacement: 1997 cc
  - Compression: 10.5:1
  - Bore & stroke: 81 by 96.9 mm (3.2 by 3.8 in)
  - Power: 150 PS @ 6,200 rpm
  - Torque: 19.4 kgf·m (190 N·m (140.1 ft·lbf)) @ 4,197 rpm

R20A2

Found in:
- 2007- Honda CR-V (RE5)
  - Displacement: 1997 cc
  - Compression: 10.5:1
  - Bore & stroke: 81 by 96.9 mm (3.2 by 3.8 in)
  - Power: 150 PS @ 6,200 rpm
  - Torque: 19.4 kgf·m (190 N·m (140.1 ft·lbf)) @ 4,200 rpm

R20A3

Found in:
- 2008- Honda Accord
  Honda Accord
  The Honda Accord is a series of compact, mid-size and full-size automobiles manufactured by Honda since 1976, and sold in a majority of automotive markets throughout the world....
  
  (CP1)
  - Displacement: 1997 cc
  - Compression: 10.5:1
  - Bore & stroke: 81 by 96.9 mm (3.2 by 3.8 in)
  - Power: 156 PS @ 6,300 rpm
  - Torque: 19.3 kgf·m (189 N·m (139.4 ft·lbf)) @ 4,300 rpm

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