The M20B25 – 2.5 liter engine without catalytic converter. It was originally released with a carburetor, and over time it was equipped with a fuel injection system – Bosch. The engine management system was used by Bosch Motronic 1.1/1.3. In 1987, the B25 was upgraded after which the capacity was increased.
The compact roadster BMW Z1 was produced in small series in Germany from 1989 to 1991, a total of eight thousand copies of the model were made.
The car, developed by the BMW Technik division (it was engaged in advanced developments), had a classic layout – the engine in front, the drive wheels in the back, but in many other ways the BMW Z1 was very different from other models of the brand. The double roadster received an original design, removable plastic body panels and unusual side doors that retract vertically down into the sills.
BMW Z1 was equipped with a 2.5-liter inline 6-cylinder engine with a capacity of 170 hp, working in combination with a five-speed manual transmission. The power unit, which allows the car to accelerate to 100 km / h in 7.9 seconds, was borrowed from the BMW 325i sedan of the E30 series.
In the first years of production, the car was very popular, which then fell sharply with the release of Mercedes-Benz SL.