Honda Civic 4. generace EF (1987-1991) – První VTEC

Revoluce jménem VTEC

Čtvrtá generace Civic EF přinesla revoluci v podobě motoru B16A s technologií VTEC. Tato inovace umožnila vysoké otáčky a specifický výkon dosud nevídaný u běžných produkčních vozů.

Civic SiR (EF9)

Verze SiR s motorem B16A nabízela 160 koní z 1.6 litru, což představovalo specifický výkon 100 k/l – rekord pro atmosférický motor té doby.

Sportovní podvozek

Dvojité příčné ramena vpředu i vzadu zajišťovala vynikající ovladatelnost, kterou fanoušci oceňují dodnes.

Přehled

The fourth-generation Honda Civic is a Japanese sub-compact automobile . It was produced by Honda from 1987 until 1991 with the wagon continuing in production in some markets until 1996. The suspension had a new double-wishbone suspension in the front and an independent suspension in the rear, the wheelbase was increased to 250 centimetres (98 in) from that of the third-generation Civic, and the body was redesigned with a lower hood line and more glass, resulting in less drag. The redesigned Civic was introduced in 1987 for the 1988 model year. The fourth-generation Civic would be available in three variants; 3-door hatchback, 4-door sedan and 5-door wagon with various trim levels offered in each variant.

In Japan, the base version received a 1.3 L SOHC single carbureted engine with 82 PS (60 kW), thus equipped it was called either 23L or 23U. This engine was also available in the commercial version of the Shuttle, sold as the "Honda Pro" initially.

The 1.5 L SOHC engine came in a variety of models, dual-point injection, single carbureted and dual carbureted. Those engines were available in the Japanese-market 25X and 25XT. The Si model featured a 1.6L DOHC 16-valve 4-cylinder (ZC) D16A8/A9 engine that produced 122 PS (90 kW; 120 hp).

In late 1989, a new trim package was added called the SiR which came equipped with a 1.6-litre DOHC VTEC 16-valve 4-cylinder B16A engine producing 160 PS (118 kW; 158 hp) at 7,600 rpm. This first B series engine , marked the introduction of Honda's variable valve timing and electronic lift control technology ( 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. The EF was originally designed for the ZC engine , not the B16A. This caused a front-to-rear weight imbalance, making the car front-heavy, this caused it to understeer. Further problems occurred with the driveshaft as the engine was mounted further forward to the ZC.

Zdroje

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