Various other engine models were used in small numbers. Due to delivery problems of Leyland in the 1950s, Perkins diesels were offered as an option for K-28 for a short time. During 1960s Kärppä-Sisu K-35 was available with BMC diesel. SAT had Ford Dagenham diesels in engine selection in 1958–1972 and they were available for Nalle-Sisu KB-24, KB-124 and KB-121 models. AEC engines were used in 1970 to power some rail vehicles and buses. The Sisu terminal tractors as well as mobile crane chassis used typically customer-designated engines; common options were Cummins, Deutz, Fiat/Iveco, Leyland, Perkins, Scania and Volvo. DAF delivered horizontally mounted six-cylinder engines for Sisu bus chassis in the middle of the 1980s, shortly before the production of bus chassis ceased.