The "CA" stands for Clean Air, due to the installation of Nissan emission reducing technology, called NAPS-X.

The oil pump is fitted directly onto the crank nose and the distributor is driven by the end of the camshaft.

[1] Later versions featured DOHC with 16 valves for increased efficiency at high engine speeds and a smoother power delivery.

The Nissan CA would also be developed into a diesel engine, known as the CD, which replaced the four-cylinder LD series.

The engine was deemed too expensive to produce due to its cast-iron block, while it also no longer met the ever-changing Japanese emission standards emerging at the time.

It was a 16-valve DOHC engine with multi-port fuel injection, for front wheel drive use.

It was used in the following vehicles: The CA18(i) is a naturally aspirated engine it delivers 91 hp (68 kW; 92 PS) at 5200 rpm.

The turbocharger was also upgraded to a Garrett T25 (.48 A/R) unit for increased flow capacity, and as such, was fitted with an intercooler to help prevent the onset of pre-ignition and/or detonation.

An electronically controlled fuel injection system was used with 370 cc (23 cu in) (flow capacity) injectors.

At the 3800 rpm change over, not only would the ECCS shift into batch fire (as opposed to sequential) fuel injection, but it also opened the second set of short, wide ports (8 ports open, 2 per cylinder) which assisted in high RPM flow.

This engine is known for stronger torque characteristics, as well as faster spool at lower RPMs.

However, due to displacement-based taxation and cost of emissions testing in Europe, the CA18DET was sold as the only available engine in the S13 chassis 200SX (Euro model) until replaced by the S14 in 1994.

It was used in the following vehicles: The CA20 is a series of SOHC 2.0 L (1,974 cc) engine produced from 1982 through 1991 (possibly longer for the CA20P).

Dual spark plugs per cylinder were used in some variants of this engine for enhanced combustion efficiency, called NAPS-X.

Also companies like Norris Designs and Spool Imports produces CA20 stroker kits as well as a CA20 engine.