A 140 ton conventional mechanical (flywheel/clutch/brake) press is a fair sized machine! You can do this sort of work with that type of machine no problem, though ... except for the strokes per minute that you are talking about. Most presses this size are around half that, tops, and beat themselves to death quickly when pushed so hard. And that's if you have material handling equipment that can keep up. Much of that depends on the shape and size of the workpiece.
If you use hydraulics, 5 tons = 10,000 lbs = roughly a 2" bore cylinder at 3000 psi, of course the outside dimensions of this cylinder will be a bit more. And hydraulics don't deliver the "hit" that a mechanical press can to get the punching action started. 140 strokes per minute will be another interesting challenge with a hydraulic machine. Even if you can cut the stroke down to (say) 1/2", you're talking about something like 42 US gallons per minute to extend and retract, and at 3000 psi, you'll need a 100 horse hydraulic pack to deliver enough volume and pressure. Smart design of the cylinders might cut down the volume on the retract stroke to less than the advance stroke to cut down the pump size somewhat.
A mechanical press will do it with a smaller motor because of the flywheel impact, although with that kind of cycling rate, the motor size is still going to be up there.
Big regular stamping press with say 600 tons and tooling that can handle 4 shots at a time at 35 strokes per minute would be a "normal" way to do this job. A 600 ton press is a big, heavy, machine ...
