Econo commercial version , and the Turbo gained an intercooler and now offered . Air conditioning finally became an option. Reflecting the design improvements, Mitsubishi advertised the car as a worthy competitor for the considerably larger cars of the one-litre class. A considerable improvement on the old model, sales of the passenger model tripled year-on-year in its first month on the market. Sales of the Econo doubled. In September 1985 a four-wheel drive model with a live rear axle was introduced. In January 1988, as the bubble economy and the kei-class horsepower war were both heating up, an aero-kit version of the Turbo was introduced to compete with Suzuki's Alto Works and Daihatsu's Mira Turbo TR-XX. Called the Turbo ZEO it was equipped with the same carburetted engine as the regular Turbo model; sales were low. There was also a low-priced, well-equipped version of the Minica Econo called the Tico, as well as a new top-of-the-line five-door sedan called the Minica Exceed. This generation was the first to reach export markets, usually labelled Mitsubishi Towny, originally with a two-cylinder 783 cc engine and a four-speed manual transmission. Beginning in March 1985, the Towny was also locally manufactured by CMC in Taiwan, only as a five-door. In 1987 a three-cylinder 796 cc engine with and a five-speed gearbox replaced the earlier drivetrain; a three-door panel van was also marketed abroad. Sixth generation In January 1989 the sixth-generation Minica (H21/H26 for front- and four-wheel-drive models respectively) was officially introduced, although the engine, wheelbase, and suspension remained unchanged. In addition to the three-door vans (hatchbacks presumably intended for commercial use) and five-door "sedans" (hatchbacks for private use), a variant with a single door on the right side, two doors on the passenger side, and a liftgate was introduced, named the Minica Lettuce. This was originally a van with a foldable rear seat and flat loading floor, to meet special tax breaks available. In May 1989 the tax benefits were lowered and the Lettuce became classified as a sedan. A three-door passenger car version was introduced at the same time. The asymmetric Minica Lettuce was developed together with the Seiyu supermarket chain, which also sold the car directly. It was meant specifically to simplify the loading of children and shopping. The pace of development in the Japanese automobile industry was relentless in the 1980s, leaving the fifth generation Minica looking rather outmoded towards the