[1] Each tram has four motors totalling 176 kilowatts (236 hp) in power output, giving a maximum speed of 60 kilometres per hour (37 mph).

[1][2] Between 1958 and 1962, Göteborgs Spårvägar put into service 125 trams of class M25, which were built for left-hand traffic, but less than a year later Sweden decided to change from left to right-side driving.

[2] The M28s were delivered before Dagen H (3 September 1967; the date the change was made) and were first placed into service coupled back-to-back to an M25 car, thus creating a double-ended but single-sided coupled-pair.

In later years they typically operated in coupled pairs with a leading M29 and a trailing M28, or as single cars on less busy routes, but other combinations were sometimes seen.

Subsequently the plan was to replace the M28 trams with the M33, a variant of the Alstom Flexity Classic, but before the completion of the delivery of that class, it was decided to take the M28s out of service for safety reasons.