Sisu SA-150 is a medium-size, two-axle off-road lorry made by the Finnish heavy vehicle manufacturer Oy Sisu-Auto Ab from 1982 until 1991.

The four-wheel-drive lorry with load capacity of 6,400 kg was developed for pulling of heavy cannons of the Finnish Defence Forces.

Based on experience from Sisu A-45 and due to new, heavier cannons, there came a need for stronger vehicles in the Finnish Defence Forces.

Due to this, Sisu-Auto started a development project of an entirely new medium size off-road lorry.

[4] The engineering work began in 1978[2] in the main office of Sisu-Auto located then in Fleming Street, Helsinki.

The other members were Kari Lindholm, Veli Vallinoja, Uoti Hartikainen and Kalevi Kakko who were the most notable engineers of Sisu-Auto.

Serial production started in Sisu-Auto Hämeenlinna factory in 1982[1] and the first delivery lot of 10 vehicles was handed over to the Defence Forces in October the same year.

[2] The engine is water-cooled, turbocharged six-cylinder in-line Valmet 611 CSBA direct injection diesel of which output is 150 kW[3] and maximum torque 680 Nm.

The axle load is nearly even and the frame allows torsional bending which helps the wheels keeping their contact on ground also on rough terrain.