The second-generation BMW E1 prototype, the Z15, was revealed in 1993 at International Motor Show Germany on September 9, 1993. Two examples of the car were built; an all-electric version and a hybrid version. The Z15, like the previous Z11, was also a 3-door city car that seats four passengers. The electric version is powered by a 19 kWh sodium nickel chloride battery and has a top speed of 80 mph (130 km/h). It is finished in green metallic paint and features a green interior.
The hybrid version also uses the 4-cylinder internal combustion engine used in the BMW K1100 motorcycle and 5-speed manual transmission and 82 hp. This variant is painted red. Both examples of the Z15-gen E1 feature a similar lightweight body to that of the Z11, which is made of aluminum and plastic.