Watch the video below to see the plethora of phrases Optimus says. These are all recorded by the legendary Tessho Genda, who is the voice of Optimus Prime/Convoy in both the G1 cartoon and in the Live Action films (just like Peter Cullen). Tessho Genda is easily the most prolific and legendary voice actor attached to American properties in Japan since not only is he the voice of Optimus Prime but also the voice of Batman (he is the Japanese counterpart to Kevin Conroy) and God of War's Kratos.
For those unaware, this is also the very first Takara release to have articulated hands and the knuckle accessory, along with the retooled abdominal area, swords, hooks and gun made from gaz tanks of the later versions.