I had a Pajero Mini 1997 import 2007, it was 660cc turbo and had 3 speed Auto Transmission and on petrol the top speed was 137km/h on motorway, I attained this speed when i was going from Lahore to Islamabad, we were 3 people in the jeep plus our luggage. But i only drove at that speed for a short while just to check the top speed, my average speed on that trip was around 100km/h and at that speed the engine was at 5500rpm.
Now I have imported a 2007 Mini Pajero (Active Field Edition) from Japan in 2012, it has a 3 Speed Auto Transmission with Over Drive which has two over drive ratios. Thus in layman terms it has 5 gears. Its top speed is again close to 140km/h. But the thing to note is that at 120km/h the engine is only at 4500rpm.
Hope it clears every thing.