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View Full Version : Mazda Cosmo (Series HB) 1981–1989



Revo
01-30-2012, 12:44 PM
The third generation HB Cosmo from 1981 shared the Mazda HB chassis with its twin, the Mazda Luce (marketed overseas as the Mazda 929). The HB Cosmo was offered both as a coupe, and sedan, and was exported to Europe as the 929, alongside the Luce sedan, which shared the 929 export name. The HB Cosmo was the only car in automotive history to offer a choice of both Gasoline and Diesel piston engines and Rotary engines, and this was the last generation Cosmo to be exported.

The Cosmo sedan was a badge engineered version of the Luce sedan, with the Cosmo coupe and sedan sold at an exclusive dealership called Mazda Auto, while the Luce was available as a sedan only, sold at previously established Japanese Mazda dealerships. All Cosmo-branded vehicles were installed with rotary engines only, while the Luce offered rotary, and piston-driven engines. Later in 1991, Mazda Auto locations were renamed Eunos.

When the FC series Mazda Savanna RX-7 was introduced in 1986 internationally, this series Cosmo coupe retained its top position as Mazda's largest rotary powered personal luxury car, with a comfortable backseat, trunk, and every luxury amemity available, while adopting the retractable headlights from the RX-7.

Mazda offered three different rotary engines for the HB series. A 12A-6PI (for "six-port induction"), 12A-turbo and 13B-RESI, with all using electronic multiport fuel injection. The latter available with automatic transmission only. The 1982 12A-turbo Cosmo coupé was officially the fastest production car in Japan until being overtaken by the FJ20ET powered R30 Skyline RS.

The rotary engine had financial advantages to Japanese consumers in that the engine displacement remained below 1.5 litres, a significant determination when paying the Japanese annual road tax which kept the obligation affordable to most buyers, while having more power than the traditional inline engines.

The HB Cosmo & Luce names were used in Japan, with the 929 being the export version (which was not available with the rotary engine options). While the Luce was updated in 1986, the Cosmo variant remained in production at a trickle until 1989.

The Mazda 929 Turbo EGI (Electronic Gasoline Injection) Luxury was available in Australia from 1986 to May 1987. It used the FET engine and came only with a manual transmission. Not all two-door 929 models used the FET, most used other variants of the FE engine, either Carburetor or EGI with optional four-speed automatic transmission. The 2.0 L (1998 cc) fuel injected, turbocharged FET version of the FE produced 135 hp (100 kW) and 175 lb·ft (237 N·m). It was a water cooled 8-valve SOHC engine featuring a small turbocharger, and no intercooler.

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One useless trivia fact: In 1982, Cosmo Coupe with turbocharged rotary engine was officially the fastest production car in Japan until being overtaken by Nissan Skyline RS in 1983.