Opel considered a V8 version of the Omega but the project was halted by GM.

Displacement: 350 cu in. | 5.7 L.
Valves: 16 (2 valves per cylinder)
Valvetrain: Overhead Valve w/pushrods
Horsepower: 310.00 HP @ 5600.00 RPM
Torque: 330.00 Ft-Lbs @ 4400.00 RPM
Transmission: 5-speed manual