[4] At first SAT continued the coachbuilding business which it had inherited from its predecessors, but also put into practice the plan of building own vehicles, which was evolved already earlier, when Autoteollisuus-Bilindustri had ordered few Volvo chassis for outfitting.

[5] As many people had suggested the successful name, the winner of the 1,000-mark prize was selected by lottery – he was young Veikko Arohonka, actually signed up by his older brother Eino, who later became a writer.

Nessling started to develop the business determinedly; the technical challenges caused by weak locally produced parts were resolved by time and the degree of domestic work could be increased.

The company owners did not believe in the potential of domestic vehicle industry and Nessling could obtain a large part of the shares from the funding banks for relatively cheap, eventually owning 80% of SAT.

Over time the technical quality was reached to a such level that SAT could convince the customers that the relatively high price of Sisus, compared to imported vehicles, pays off due to their robustness.

Due to the contemporary Estonian taxation system, complete vehicles could not be exported there, and therefore the cabins and superstructures were built locally.

The city of Riga bought a series of forward control buses powered by Hercules diesel engines which were delivered in 1937 and 1938.

[13] Right after the Winter War in spring 1940 SAT started producing an own carburettor type under name Häkä for carbon monoxide fuel.

[16] The plan was put into practice due to the war which made the factory located in the capital vulnerable to Soviet air raids.

[19] At the same time when SAT built the new factory in Karis, the Finnish Defence Forces reported needing thousands of vehicles in the near future.

In 1956 SAT built a series of ten DKW Schnellasters from CKD kits imported from West Germany; they were sold with name Donau-Sisu.

Additionally, some modifications were made for SAT-imported Aveling-Barford and Avelin Austin graders and dumper trucks and also Leyland Terrier and BMC Mastiff lorries.

[33] SAT had plans of starting local production in Medellín jointly with Leyland Motors but the project was eventually cancelled due to financial risks.

[34] In the early 1970s the Andean Community of Nations decided about starting its own lorry production and the successful trading came to end after about 1200 sold units.

In 1976 the state signed the so-called tripartite agreement with British Leyland International and Saab-Scania, which both held 10% share of SAT thereafter.

[46] The development programme had, however, demanded excessive amount of money and the company main owner, the state, removed Gillberg from office at end of 1983.

[44] On the other hand, the new organisation setup led to fragmentation of engineering operations between lorry, terminal tractor and military vehicle segments, and significant loss of synergy.

[56] Raitis was replaced by Olof Elenius in 2007[57] In the same year Sisu Auto had sold its aftermarket services to Veho, which also represents Mercedes-Benz.

[62] In 2013 Olof Elenius left his position and sold his share to Timo Korhonen, who now became the general manager and the sole owner of the company.

[17] SAT tested layout in which the engine was mounted transversely in the back in a 1965 introduced bus chassis prototype B-65 which also featured independent front suspension.

[66] In the late 1970s SAT produced jointly a hybrid bus prototype SWS for Helsinki City Transport together with Wiima and Strömberg.

[64] In 1983 the company got a new general manager, Jorma S. Jerkku, who had previously worked for bus coach builder Ajokki Oy [fi] and who was aware of Sisu's position in the intense market.

[75] SAT planned starting vehicle imports in the late 1930s; a number of British car makes were considered, including Morris Motors products, as well as American tractors.

The initial model was called AMG of which military designation was SA-5; it was also produced by Tampereen Pellava- ja Rauta-teollisuus as Tampella 6000.

For a short time in late 1940s Hercules diesels were used, but as soon as their production ended, SAT was forced to find new power options.

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 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.

[67] When Sisu Auto started component partnership with Mercedes-Benz, the MB Telligent and PowerShift gearboxes came to selection, the non-synchronised Fuller still remaining as an option.

In the new system the army applications had the second letter A; lorry models were SA, armoured personnel carriers XA and tracked vehicles NA.

[99] The conventional cabin models were low SL[100] and SN[101] and the high SR.[102] There was also the option of an aerodynamic version of the S-series, called the Futura, which debuted at the Moscow Auto Show (MIMS) in August 1993.