The BMW Z1 is the first model in BMW's line of Z series roadsters (two-seater convertibles), and was produced in limited numbers from 1989 to 1991. The Z1 is unique for its plastic body panels and vertically sliding doors which drop into the door sills. It is one of the first BMWs to use a multi-link rear suspension. The sole drivetrain specification is the 2.5-litre straight-six engine and 5-speed manual transmission from the E30 325i. In 1996, the Z1's successor, the mass-produced Z3, began production. (Source: Wikipedia.org, CC BY-SA)