Acura K20A2 Engine for Sale – 2.0L DOHC i-VTEC Performance Engine

Looking for an Acura K20A2 engine for sale? The Acura K20A2 is a 2.0-liter DOHC i-VTEC four-cylinder engine originally fitted to the Acura RSX Type-S. Known for its high-revving design, naturally aspirated performance, and Honda K-Series engineering, the K20A2 is a popular option for engine replacement projects and performance-oriented builds.

Whether you are replacing a damaged engine, restoring an Acura RSX Type-S, or planning a Honda K-Series engine swap, the K20A2 offers a well-established engine platform. Its 1,998 cc displacement, aluminum-alloy construction, dual overhead camshafts, and variable valve timing technology make it an important option for buyers seeking a genuine Honda/Acura performance engine.

If you are ready to purchase an Acura K20A2 engine, confirm the engine code, condition, included components, and compatibility with your vehicle before ordering.

Compatibility / Fitment Notes

The Acura K20A2 was primarily designed for the Acura RSX Type-S. It is also considered for compatible Honda K-Series engine conversion projects.

Primary factory application:

• 2002 Acura RSX Type-S

• 2003 Acura RSX Type-S

• 2004 Acura RSX Type-S

Potential engine swap applications:

• Honda Civic EP3

• Honda Civic Si

• Honda Civic Type R EP3

• Other compatible Honda K-Series chassis

For engine swap applications, compatibility depends on the vehicle chassis, engine mounts, transmission, wiring harness, ECU, sensors, intake and exhaust configuration, and supporting components.

The K20A2 should not be assumed to be a direct bolt-in replacement for every Honda or Acura vehicle using a K-Series engine. Always compare the original engine code and vehicle specifications before purchasing.

Engine Configuration

The K20A2 features an inline four-cylinder configuration with a dual overhead camshaft (DOHC) valvetrain and Honda's i-VTEC technology.

Its 16-valve cylinder head provides four valves per cylinder, while the variable valve timing and lift control system is designed to support engine performance across different operating conditions.

The engine uses an aluminum-alloy block with cast-in iron cylinder liners and a chain-driven camshaft system.

This configuration makes the K20A2 a suitable option for buyers seeking an original RSX Type-S replacement engine or a K-Series foundation for a compatible performance project.

Engine Displacement

The Acura K20A2 has a displacement of 1,998 cc (2.0 liters).

It uses an 86 mm bore and 86 mm stroke, giving it a square engine configuration. The original US-market K20A2 also features an 11.0:1 compression ratio.

Buyers searching for a 2.0L Acura K20A2 engine should verify the engine identification code before ordering. Other K20 engines, including the K20A3 and K20Z1, have different specifications and should not automatically be treated as identical replacements.

Fuel Type

The K20A2 is designed to operate on unleaded gasoline (petrol).

It uses Honda's Programmed Fuel Injection (PGM-FI) system to control fuel delivery. The original RSX Type-S application specifies premium unleaded gasoline.

When installing a replacement K20A2, ensure the fuel injectors, fuel delivery system, ECU, wiring, and associated sensors are compatible with the engine configuration.

Aspiration / Induction

The factory Acura K20A2 is a naturally aspirated engine.

It does not use a factory turbocharger or supercharger. Instead, it combines its DOHC i-VTEC cylinder head, electronic fuel injection, and high-compression design to deliver its original naturally aspirated performance.

Buyers considering forced-induction modifications should account for the engine's condition, compression ratio, fuel system, engine management, and supporting modifications.

Power Output

The original US-market Acura K20A2 produces approximately 200 horsepower at 7,400 RPM.

Its high-revving characteristics make it particularly attractive to enthusiasts looking for a naturally aspirated Honda K-Series engine.

The engine's factory power output is one of the main reasons buyers consider the K20A2 for Acura RSX Type-S restorations and compatible Honda engine swap projects.

Actual performance from a replacement engine depends on its mechanical condition, maintenance history, ECU configuration, and installed components.

Torque

The factory K20A2 produces approximately 142 lb-ft of torque at 6,000 RPM.

Its power and torque characteristics are designed around a high-revving naturally aspirated engine configuration.

For buyers planning an engine replacement or conversion, matching the engine with a compatible transmission, clutch, ECU, and drivetrain components is important.

Years / Generation

The K20A2 is associated primarily with the first-generation Acura RSX Type-S in the US market.

The later RSX Type-S models transitioned to other K20 engine variants, including the K20Z1. Therefore, buyers should verify the engine code rather than purchasing based on the 2002–2006 RSX model range alone.

Why Buy an Acura K20A2 Engine?

Choosing the correct replacement engine is important for maintaining your vehicle's intended performance and mechanical compatibility.

The Acura K20A2 offers several features that make it attractive to engine buyers:

• Original Honda K-Series design: A factory-developed 2.0L engine with established Honda/Acura applications.

• DOHC i-VTEC technology: Features variable valve timing and lift control.

• Naturally aspirated configuration: Suitable for buyers seeking the original factory engine setup.

• High-revving performance: Factory-rated at 200 HP in its original US-market application.

• Engine swap potential: Considered for compatible Honda K-Series conversion projects.

• Acura RSX Type-S replacement: A relevant engine option for owners restoring or repairing the original vehicle.

What to Check Before Buying a K20A2 Engine

Before purchasing an Acura K20A2 engine, confirm the following details with the seller:

1. Engine identification: Verify that the engine is a genuine K20A2 and not a K20A3, K20Z1, or another K-Series variant.

2. Engine condition: Ask about running condition, compression test results, and any known mechanical problems.

3. Included components: Confirm whether the sale includes the cylinder head, engine block, intake manifold, alternator, starter, sensors, and accessories.

4. Transmission compatibility: Establish whether the engine is supplied with or without its original transmission.

5. Mileage: Request documented mileage where available.

6. ECU and wiring: Confirm whether the original ECU, wiring harness, and relevant sensors are included.

7. Shipping and warranty: Request available shipping options, delivery estimates, and applicable warranty terms.

These checks help buyers understand exactly what they are purchasing and avoid compatibility problems during installation.

Buy an Acura K20A2 Engine for Sale

If you need a genuine Acura K20A2 engine for your vehicle replacement or Honda K-Series conversion project, choosing the correct engine code and configuration is the first step.

The 2.0L K20A2 combines DOHC i-VTEC technology, naturally aspirated induction, and an original factory output of 200 horsepower, making it a sought-after option for Acura RSX Type-S applications.

Contact our sales team to inquire about the availability and pricing of an Acura K20A2 engine. Provide your vehicle's make, model, year, and current engine code so that the correct replacement configuration can be identified.

Request a Quote Today: Ask about current stock, engine condition, included components, shipping arrangements, and applicable warranty coverage before placing your order.

Frequently Asked Questions

1. How much horsepower does the Acura K20A2 engine produce?

The original US-market K20A2 produces 200 horsepower at 7,400 RPM.

2. What vehicles use the K20A2 engine?

The K20A2 was factory-installed in the 2002–2004 Acura RSX Type-S in the US market. It is also used in compatible Honda K-Series engine conversion projects.

3. Is the Acura K20A2 a 2.0L engine?

Yes. It has a displacement of 1,998 cc, equivalent to approximately 2.0 liters.

4. Is the K20A2 turbocharged?

No. The original factory K20A2 is naturally aspirated and does not use a factory turbocharger or supercharger.

5. What fuel does the K20A2 use?

The K20A2 uses unleaded gasoline. The original Acura RSX Type-S application specifies premium unleaded fuel.

6. Is the K20A2 compatible with a Honda Civic?

It can be installed in certain Honda Civic platforms through compatible K-Series conversion setups. However, engine mounts, transmission, wiring, ECU, and other supporting components must be checked before installation.

7. What is the difference between K20A2 and K20Z1?

Both are 2.0L Honda K-Series engines, but they have different engine specifications and original vehicle applications. The K20Z1 was used in later Acura RSX Type-S models and has a different factory performance rating.

8. How can I order an Acura K20A2 engine?

Contact the seller for current availability, pricing, engine condition, included components, shipping options, and warranty details. Provide your vehicle information to help confirm fitment before purchasing.

The K20A2 is associated primarily with the first-generation Acura RSX Type-S in the US market.

Acura K20A2 Engine Specifications

Compatibility / Fitment Notes

The Acura K20A2 was primarily designed for the Acura RSX Type-S. It is also considered for compatible Honda K-Series engine conversion projects.

Primary factory application:

• 2002 Acura RSX Type-S

• 2003 Acura RSX Type-S

• 2004 Acura RSX Type-S

Potential engine swap applications:

• Honda Civic EP3

• Honda Civic Si

• Honda Civic Type R EP3

• Other compatible Honda K-Series chassis

For engine swap applications, compatibility depends on the vehicle chassis, engine mounts, transmission, wiring harness, ECU, sensors, intake and exhaust configuration, and supporting components.

The K20A2 should not be assumed to be a direct bolt-in replacement for every Honda or Acura vehicle using a K-Series engine. Always compare the original engine code and vehicle specifications before purchasing.