Facts About the Fourth Generation

Quickest to the 10 million mark

The Corolla series reached production total of 10 million units in March 1983. This milestone was achieved in a mere 16 years and four months since the first generation Corolla was released. This was the first such success for a single model series in Japan and was a brilliant feat in the world as well, following the Ford Model T, the Chevrolet and the Volkswagen Beetle. Furthermore, the record pace of 16 years and four months to break the 10 million mark was the quickest ever for a vehicle produced after World War II.

Challenge to see the invisible

When the 3A-U II and 4K-U II LASRE (Light-weight Advanced Super Response Engine) series engines were developed for the fourth generation Corolla, a major theme was "visualization" of air flow inside the engine. Based on technology cultivated while developing measures to reduce emissions, smoke was inserted into a transparent model of the cylinders, and wind speed sensors were used to observe the flow of air. This technology was further refined, and computer simulation technology was perfected. The use of this technology later led to the development of the "high-mecha twin cam," a truly innovative engine mechanism.

New technology constantly incorporated in the Corolla

From the time that the new LASRE 3A-U II engine was developed until the BEAMS (Breakthrough Engine with Advanced Mechanism System) series was introduced, Toyota engines were developed based on the LASRE theme. The aluminum cylinder head and counter flow intake and exhaust manifolds were considered advanced technology for the time. In addition, the newly designed rear suspension was highly rated compared to the Corollas of the past. The leaf rigid suspension, which had been used in the past, was a rugged, highly reliable suspension even when used in trucks, but it had limitations as a suspension for passenger cars. Recognizing this, the team researched suspensions of European vehicles and developed a 4-link suspension with lateral rods. As a result, dramatic improvements in performance were achieved for both riding comfort and handling stability.

Tests implemented throughout the world

In order to be a true international competitor, the fourth generation Corolla needed to conform to all types of conditions throughout the world. To achieve this, prototype vehicles were sent to Europe, the United States and Canada, where various compatibility tests were implemented. For example, high speed cruising tests were conducted on the Autobahn and country roads of West Germany. Dynamic performance and riding comfort tests were performed on Belgian brick roads. Thermal endurance tests were performed in the mid-summer desert in the U.S., and frigid climate tests were done in Canada. The Corolla had already seen the most demanding conditions before it was released to the world.

Secret of Corolla