Acura 2.0L 4-cylinder

Acura 2.0L 4-cylinder — every model and year that used this engine (5 models, 2002–present), based on NHTSA VIN build data, with links to prices and reliability.

2.0L · 4 cylinders · 80% of builds flagged turbo · seen in 5 models, 2002–2026

By the numbers

Output range 150–320 hp (median 272 hp). Gasoline: 100%. Based on 230 decoded NHTSA VIN build sheets.

About this engine family

The Honda K-series engine is a line of four-cylinder four-stroke car engines introduced in 2001. The K-series engines are equipped with DOHC valvetrains and use roller rockers on the cylinder head to reduce friction. The engines use a coil-on-plug, distributorless ignition system with a coil for each spark plug. This system forgoes the use of a conventional distributor-based ignition timing system in favor of a computer-controlled system that allows the ECU to control ignition timings based on various sensor inputs.

The cylinders have cast iron sleeves similar to the B- and F-series engines, as opposed to the FRM cylinders found in the H- and newer F-series engines found only in the Honda S2000.

In detail

Additional notes: K20A Spec R engine (FD2 Civic Type R) Chromoly flywheel, higher-tensile strength connecting rods, high-compression pistons, stiffer valve springs, higher-lift hollow camshafts with more duration, and 2007–2011 cylinder-head intake-port and exhaust-port surface polishing used in NSX-R. The JDM K20A type-R engine block would be removed from production assembly line by an experienced Honda engine technician to torque the connecting rod bolts to factory specification by hand using micrometer to measure connecting rod bolt stretching.

Then the JDM K20A type-R engine block would be returned to the production assembly line to complete the engine building process. Injection Pressure: Center Fuel Injection with swirl guide Air-Fuel Ratio: Normal driving cycle: 65:1 (ultra-lean combustion) Acceleration/High load driving cycle: 14.7:1 (Stoichiometric) Deep Piston Cavity formed in top of Pistons Intake Manifold code: PPD Application: 2003–2006 Honda Stream Absolute Additional notes: K20Z3 (as fitted to Ariel's Atom 3.5) The K20Z3 has Honda's traditional performance VTEC on the intake and the exhaust cams, as found on previous generation of engines.

Variable cam timing technology is included on the intake but not the exhaust cams. The added timing control corresponds to the "i" in i-VTEC. Earth Dreams Technology K20C1: First Honda Type R engine to be built in the US at the Honda Anna Engine Plant in Anna, Ohio. First time Honda has used a turbocharger on the TYPE R. K20C5: All Acura RDX sold in China (manufactured by GAC Acura) Although the K20C4 in the Acura RDX and the K20C6 in the Acura TLX share the same internals, they are named differently due to different engine mount points to accommodate the sedan body of the TLX.

The VTEC mechanism is available only on the exhaust valves. K20C1 engines have an offset of 8mm on the crankshaft from the centerline of the bore. K20C8 (Acura Integra Type S): Engine is identical to the K20C1, it is named differently to accommodate different mounting points. Additional notes The K20C9 is a Dual VTC Atkinson cycle engine and uses direct injection. Additional notes: This version of the K engine uses a Mitsubishi TD04HL-15T turbocharger with a dual path turbine housing, optimizing low end response while allowing better high end flow.

Maximum boost pressure is 13.5psi. The engine includes i-VTEC and VTC technologies and comes mated to a version of Honda's 5-speed automatic with SH-AWD (note: SH-AWD was standard from 2007–2009 and optional from 2010–2012). Additional notes: K24A2 (2006–2008 Acura TSX) Increased intake flow: Intake valve + 1 mm oversize (Intake valve head measures 36mm, but valve seat still measures 35mm) Intake cam High lift lobe with 0.9 mm more lift and 12 degrees more duration Throttle body increased from 60–64 mm Radius on some intake pipes increased from 70–80 mm Increased exhaust flow Exhaust Head pipe increased from 60–65 mm Higher flow catalytic converter Main (single) exhaust pipe increased from 54–57 mm Rear (twin) pipes increased in diameter from 42.5 to 45 mm Block improvements: Additional air passages in crankcase for reduced pumping losses Others Stronger connecting rods Under-piston oil squirters Direct Injection, i-VTEC (intake camshaft & valvetrain)

Source: Wikipedia — Honda K engine, CC BY-SA.

Models that used this engine

Model Years with this engine Fuel VIN builds seen
RDX 2019–2026 Gasoline 122
TLX 2021–2025 Gasoline 56
RSX 2002–2005 Gasoline 28
ILX 2013–2015 Gasoline 18

Engine usage derived from NHTSA VIN build data (displacement + cylinder configuration). Model links lead to prices, generations and reliability.

For sale with this engine