R-series
R18Z1
R18Z1 SOHC i-VTEC
Displacement
1.8L (1799 cc)
Configuration
Inline-4
Power
145 PS (107 kW; 143 hp) @ 6500 rpm
Torque
175 Nm (129 lb-ft) @ 4300 rpm
Compression
10.6:1
Bore × Stroke
81.0 mm x 87.3 mm
Valvetrain
SOHC i-VTEC (chain-driven cam)
Aspiration
Naturally aspirated
Fuel System
PGM-FI
OBD
OBD2
Redline
6800 rpm
Years
2012-2020
Factory Fitment
Honda Civic FB2/FG3 (2012-2015), Honda Civic FC6/FK5 (2016-2020); Civic (FK5, 2016-2021); Civic (FG3)
Notes
Ninth- and tenth-generation Civic 1.8L; runs a low-power cam profile by default with an economy profile at light loads. 7100 rpm fuel cutoff.
Swaps using the R18Z1
Guides mentioning the R18Z1
Difficult
1-2 days
Civic Type R 5-Lug Brake and Suspension Conversion for the 1996-2000 Civic (EK)
Easy
15-30 minutes
Honda PGM-FI Fault Code Reading and ECU Reset (OBD0/OBD1/OBD2)
Expert
6-10 hours (excluding paint and parts lead time)
Honda Fit (GE8) JDM 11-Pin Folding, Heated Door Mirror Retrofit
Difficult
6-10 hours
Honda Prelude (4th Gen) Projector Headlight Retrofit
Moderate
1-2 hours
Honda Civic 2.2 i-CTDi Diesel EGR Valve Removal and Cleaning
Difficult
4-6 hours
Honda Fit (GE8) LED Taillight and Rear Fog Light Retrofit
Difficult
3-4 hours
Honda Fit (GE8) HomeLink and Ambient Light Retrofit Using an Acura TSX Overhead Console
Moderate
4-6 hours (plus sealant cure time)
DIY Amber City Lights in Honda Headlight Housings
Expert
About 1 week (5 working days)
Honda Civic (8th Gen, R18) Engine Bay Wire Tuck
Moderate
3-4 hours
TSX Front Brake Upgrade for the 8th-Generation Honda Civic (LX/EX)
Difficult
3-5 hours
Diagnosing Dead ECT, CMP and Wideband O2 Signals After a K-Series Conversion Harness Swap
Moderate
1-2 hours
Honda Civic 1.8 Manual Transmission Fluid Change (8th Gen R18)