Honda K20 Engine 2.0L i-VTEC
The Honda K20 is a 2.0-liter, DOHC inline-4 engine introduced in 2001 as the successor to the legendary B-series. Featuring Honda's advanced i-VTEC system (Variable Valve Timing and Lift Electronic Control), all-aluminum construction with cast iron cylinder sleeves, and coil-on-plug ignition, the K20 has become the gold standard for high-performance swaps ("K-swaps") in everything from Civics and Integras to Miatas, BMWs, and classic Minis.
Parameter | Value |
|---|---|
Engine Code | K20 (various: K20A, K20A2, K20Z1, K20C1, etc.) |
Configuration | Inline-4 (Straight 4) |
Displacement | 1,998 cc (2.0L) |
Bore x Stroke | 86 mm x 86 mm (Square design) |
Cylinder Block Material | Aluminum with cast iron sleeves |
Cylinder Head Material | Aluminum |
Valvetrain | DOHC, 4 valves per cylinder, with i-VTEC (VTC on intake cam) |
Compression Ratio | 8.8:1 – 11.7:1 (depending on variant) |
Fuel System | Programmed Fuel Injection (PGM-FI) |
Ignition System | Coil-on-plug (distributorless) |
Engine Weight (Dry) | 125 kg (275 lbs) without gearbox / 183 kg (403 lbs) with gearbox |
Redline | 6,800 – 8,600 RPM (depending on variant) |
Variant | Application | Power | Torque | Redline |
|---|---|---|---|---|
K20A (JDM Type R) | 2001-2006 Integra Type R (DC5) | 217 hp @ 8,000 rpm | 152 lb-ft @ 7,000 rpm | 8,600 rpm |
K20A (JDM Type R) | 2007-2011 Civic Type R (FD2) | 221 hp @ 8,000 rpm | 159 lb-ft @ 6,100 rpm | 8,600 rpm |
K20A2 | 2002-2004 Acura RSX Type S / EP3 Civic Type R (EDM) | 200 hp @ 7,400 rpm | 142 lb-ft @ 6,000 rpm | 8,250 rpm |
K20Z1 | 2005-2006 Acura RSX Type S | 210 hp @ 7,800 rpm | 143 lb-ft @ 7,000 rpm | 8,300 rpm |
K20A3 | 2002-2005 Honda Civic Si (EP3) | 160 hp @ 6,500 rpm | 141 lb-ft @ 4,000 rpm | 6,800 rpm |
K20C1 (Turbo) | 2015+ Civic Type R (FK2/FK8/FL5) | 306-316 hp @ 6,500 rpm | 295 lb-ft @ 2,500 rpm | 7,000+ rpm |
i-VTEC System: Variable Timing Control (VTC) on intake cam continuously adjusts camshaft phasing, while VTEC switches between low and high-lift cam profiles for optimal power across the RPM range.
Dual i-VTEC (Performance Models): On K20A, K20A2, and K20Z1, VTEC operates on both intake AND exhaust valves for maximum high-RPM power.
All-Aluminum Construction: Lightweight engine block with cast iron cylinder liners provides excellent strength-to-weight ratio and rebuildability.
Square Bore/Stroke (86mm x 86mm): Perfect geometric balance for both low-end torque and high-RPM power delivery.
Coil-on-Plug Ignition: Distributorless system allows ECU to control individual coil timing for precise spark management.
Roller Rocker Arms: Reduces valvetrain friction and improves reliability at high RPM.
Chain-Driven Timing: Maintenance-free timing chain (no belt replacement required).
Turbocharged Option (K20C1): Features exhaust-side i-VTEC (unique configuration to control exhaust gas flow to the turbo), lightweight turbocharger, electronic wastegate, and piston oil cooling channels.
Variant | Donor Vehicle | Key Notes |
|---|---|---|
K20A (JDM) | Civic Type R (EP3/FD2), Integra Type R (DC5), Accord Euro R (CL7) | Highest performance NA version. PRC/RRC intake manifold. |
K20A2 | Acura RSX Type S (2002-2004), EP3 Civic Type R (Europe) | Dual i-VTEC. PRB intake manifold. 200 hp. |
K20Z1 | Acura RSX Type S (2005-2006) | Updated K20A2 with 210 hp. |
K20A3 | Honda Civic Si (EP3), Acura RSX (Base) | Economy i-VTEC (intake only). 160 hp. Great for boost. |
K20C1 | Civic Type R (FK2/FK8/FL5), Acura Integra Type S (DE5) | Turbocharged. Requires OEM ECU and harness. |
K20C2 | Civic LX (2016+) | Naturally aspirated economy version. |
1x Honda K20 Longblock (Cylinder head + engine block)
1x Intake Manifold with Throttle Body (varies by variant: PRC, RRC, PRB, RBC)
1x Exhaust Manifold (4-2-1 or 4-1 depending on variant)
1x Wiring Harness (if included – specify donor vehicle)
Injectors, ignition coils, alternator, starter, and ECU.