Rolls-Royce diesels came into selection in 1955 in Sisu K-36, the strongest flatbed hauler in Finland at its time. The 250-hp engine type was C6SFL. Later the same engines were used in some dumper trucks and in 1961 in K-50SS, the up-to-date largest automobile built in the Nordic countries. In 1966 SAT produced vehicles with 300-hp Rolls-Royce diesels; the Sisu K-142SS was one of the most powerful trucks in Finland and advertised as "the king of the highways". The Rolls-Royce Eagle engines became to the selection in 1967. The 1970 introduced R- and M-series had initially the 282-hp Eagles; a number of variants with different outputs were presented after.