B205 & B235
The B205 and B235 engines are an evolution of the B204 and B234 engines. They were introduced in the 1998 Saab 9-5 giving reduced fuel consumption and emissions with improved refinement. The changes included lightweight internal components (lighter valves, softer valve springs, longer conrods with lighter pistons, and balance shafts), lighter block and cover, heavier flywheel and more. Another development was the introduction of the Trionic 7 torque demand type engine management system. Trionic 7 equipped engines have the black direct ignition casing on top of the engine rather than the red of the Trionic 5.
Read more about this topic: Saab H Engine