Legendary Honda H22A4 Engine Guide - Specs, Generations, Mods

The Legendary Honda H22A4 Engine

The Honda H22A4 engine has achieved an almost legendary status among Honda enthusiasts and is considered one of Honda's best high performance engines. This 2.2L DOHC VTEC engine was originally introduced in 1993 in the Prelude and Accord models. Let's take a closer look at what makes the H22A4 so special.

H22A4 Engine Specs

Here are some key specs for the H22A4 engine:

• Displacement: 2156 cc
• Bore x Stroke: 87 mm x 90.7 mm
• Compression Ratio: 10.6:1
• Horsepower: 200 hp @ 7000 rpm (JDM type S)
• Torque: 164 lb-ft @ 6500 rpm (JDM type S)
• Redline: 7900 rpm
• Engine Layout: DOHC VTEC 4 cylinder
• Engine Code: H22A4

As you can see, this engine offers an impressive amount of power while still maintaining high rpm capabilities. The DOHC VTEC system allows the engine to have both great low-end torque and high-end horsepower.

H22A4 Engine Generations

The H22A4 engine went through a few different generations and variations over its production run including:

• H22A - The original JDM version introduced in 1993 Prelude VTEC models. It featured 200 hp.
• H22A1 - The JDM Accord SiR version launched in 1994. Very similar to H22A.
• H22A4 - The engine found in USDM Accord and Prelude models from 1995-2001. It made 195 hp due to emissions equipment.
• H22A8 - Higher compression JDM version in 1997+ Prelude Type S. Made 200 hp.

While output varied slightly between regions, all versions of the H22A offer outstanding performance and rev happy power bands.

Strong Aftermarket Support

A major reason for the H22A4's popularity is its immense aftermarket support. Here are some of the most popular modifications:

• Turbo Kits - Many companies offer bolt-on turbo kits capable of boosting power over 300 hp.
• Supercharger Kits - For those seeking boosted power without the turbo lag.
• Intakes - Aftermarket cold air intakes improve airflow and throttle response.
• Headers - High flow 4-2-1 headers maximize exhaust flow and power gains.
• Engine Internals - Stronger H-beam rods, pistons and cams for big power builds.

There are tons of additional mods like ECU tunes, lightweight flywheels and upgraded fuel systems to take the H22A4 to the next level. With the right mods, over 400 hp is achievable from this engine.

H22A4 Engine Swaps

Given its performance potential, the H22A4 is one of the most popular Honda engines for swaps. Here are some popular platforms:

• EG/EK Civics - The H22A4 drops right in for a big power gain.
• DC2 Integra - The H22 swap is a thrilling way to add 100+ hp.
• S2000 - Requires custom mounts but transforms the S2000's performance.
• Del Sol VTEC - A fun sleeper with a potent 220+ hp H22 swap.

With the right combination of chassis and modifications, H22 swapped Hondas can compete with just about any sports car on the road or track.

Downsides of the H22A4

While an amazing engine overall, the H22A4 is not without some downsides. These include:

• Higher weight than B-series engines
• More expensive/difficult to find than B-series
• Higher maintenance costs and requirements
• Increased complexity compared to simpler SOHC VTEC motors

However for serious Honda enthusiasts, the H22's superior performance outweighs these drawbacks. Proper maintenance and tuning can help maximize reliability.

The H22A4 Legacy

Even though production ended in 2001, the Honda H22A4 engine's legacy lives on. It represented the pinnacle of Honda's high revving naturally aspirated VTEC performance engines. With abundant aftermarket support and a cult-like following, modified H22 engines will continue to thrill Honda fans for years to come.

FAQs

What years was the H22A4 engine used?

The H22A4 engine was used in Honda models from 1995-2001 in the USDM Accord and Prelude.

How much horsepower does a stock H22A4 make?

The USDM H22A4 engine produced 195 horsepower in stock form. The JDM Type S version made 200 hp.

What's the difference between an H22A vs H22A4?

The H22A is the original JDM engine that produced 200 hp. The H22A4 is the USDM variant with slightly less horsepower due to emissions equipment.

What cars did the H22A4 engine come in from the factory?

The H22A4 was available in the 6th generation Honda Accord and 5th generation Honda Prelude sold in North America.

Is the H22A4 a VTEC engine?

Yes, all versions of the H22A utilize Honda's DOHC VTEC technology to provide both low-end torque and high-rpm power.