The TOR series of generator sets incorporate the IVECO aifo range of diesel engines. Power nodes covered are from 60 to 345kW. IVECO aifo is the industrial engine division of FIAT, and in the group of companies that incorporate Case New Holland (CNH). As such, IVECO engines are extensively used with CNH and other FIAT companies. These companies market equipment powered by IVECO throughout the world with significant sales into North American.

The TOR series is supplied open and enclosed. The enclosed sets as standard are supplied in a fully enclosed sound attenuated canopy. Himoinsa sound enclosures are supplied in the unique looking Himoinsa enclosure with curves for strength, durability and looks, where other have corners and edges, susceptible to corrosion, fatigue and wear. The unique design offers the minimum of outside fasteners, again this makes a more durable set with enhanced durability and superior appearance.