Honda EF

The base model of the fourth generation Civic had a 1.2 L SOHC, this single carbureted engine was not available for the Japanese and American markets. In Japan the base version received a 1.3 L SOHC single carbureted engine, thus equipped it was called either 23L or 23U.
The 1.5 L SOHC engine came in a wide variety of models, dual-point injection, single carbureted and dual carbureted. Those engines were available in the Japanese-market 25X and 25XT. The Japanese version of the sporting Si, initially the top version, featured a (ZC) D16A8/A9 1.6 L 16V DOHC engine.
But there was more to come, and in late 1989 the new top model of the hatchback was the new SiR, fitted with the 1.6-litre, 160 PS (118 kW; 158 hp) at 7,600 rpm "B16A" DOHC VTEC engine. This, the first B engine, marked the introduction of Honda's variable valve timing and electronic lift control technology, or VTEC. By providing two different camshaft profiles—one for fuel economy, one for performance—the VTEC engines set a high-revving, naturally aspirated precedent for future performance variants of the Honda Civic. With its light weight, independent suspension and powerful engine, the car was well-received globally, receiving “Golden Steering Wheel Award” from the German newspaper Bild am Sonntag, and ranking first in France’s l’Automobile magazine 1989 survey on car quality and reliability. The European model, badged as a "1.6i-VT", used a slightly less powerful B16A1 engine, which had an 8,200 rpm redline and made 150 hp (112 kW), although it made the same 111 lbf·ft (150 N·m) of torque as the Japanese market B16. In Japan, automatic-equipped SiR Civics also received the lower-powered engine.
The wagon, known in Japan as the Civic Shuttle, continued but the commercial-use "Shuttle Pro" was replaced by a dedicated commercial delivery van called the Honda Partner starting with model year 1996.Initially, the Civic Si hatchback was absent from the lineup, with only the CRX Si offered for the 1988 model year. That changed, however, for 1989, and the Civic Si hatchback was reintroduced, along with a 3-hp upgrade for the D16 engine across all Si trims (making 108 hp, 1988 CR-X Si 105 hp). This was the sportiest US market Civic, only available as a hatchback. The engine fitted was the D16A6 16-valve SOHC with 4-point injection and output of 108 hp (81 kW). It weighed in at 2,286 lb (1,037 kg), achieving a factory 0–60 mph of 8.1 seconds; and a quarter-mile time of 16.2 at 82 mph (132 km/h).