not entirely true. Here is the basic write up from a website dedicated to 4th gen civics.
The 4th generation Honda Civic was introduced in Europe at the IAA in Frankfurt Germany in September 1987. It was a very technical advanced car for its time, 4 valves per cylinder, double wishbone suspension front and rear and VTEC for the top model hatchback. It was available as 3 door hatchback, 4 door sedan, wagon (shuttle) and 3 door coupe (CRX). Rover build their 200 and 400 series on the Civic base.
A wide variety of engines was available for the 4th generation Civic. From a 1.2L SOHC to the 1.6L DOHC VTEC. 4WD was an option on the top models Sedan and Wagon (shuttle).
Base model of the 4th generation Civic was a 1.2L SOHC, this single carbureted engine was not available for the European and American market. For Europe the base model was the 1.3Luxe (DX for the United Kingdom) and 23L/23U for the Japanese market. 1.3L SOHC single carbureted engine.
Next engine was the 1.4L (GL) which was not available in the USA and Japan. It was a 1.4L SOHC dual carburetted engine which was available in most countries only in 1988 and 1989. It was replaced by the 1.5i GL and GLX in 1990. In some countries however the carburetted engines staid available after 1989.
The 1.5L SOHC engine came in a wide variety, dual-point injection, single carburetted and dual carburetted. Those engines were available in the JDM 25X/25XT, USDM DX and the USDM STD model (USDM base model), EDM 1.5i GL and GLX (only difference between EDM GL and GLX is a different standard equipment and a different Final Drive Ratio).
Next in line was the 1.6L SOHC. Simply 1.6i for the European market and Si for the American market (USDM top model). (not to be confused with the JDM Si which is a 1.6L DOHC)
Second highest model was the JDM Si. It was equipped with a 1.6L DOHC (ZC) engine and produced 130ps. The EDM 1.6i GT and 1.6i-16 (depends on country) had a ZC like 1.6L DOHC engine and had a stock 124hp (D16Z5) or 130hp (D16A9). All DOHC engines are equipped with Honda's multipoint fuel injection system (although there seems to have been a 1.6L DOHC non-VTEC with dual carburetors for the 4th gen. Not much is known about that engine).
Top model of the hatchback was the Japanese SiR with the 160ps B16A engine. In Europe the SiR was called 1.6i-VT and had a similar B16A1 engine. These top models of the 4th generation Civic were one of the first Honda's that were equipped with the famous VTEC system (the NSX was the first, the JDM 90/91 Integra XSi/RSi also had a B16A).
