The Ordos trike goes really faster on open terrain than any other quad but are really badly armored and thus have less HP to reflect this.
If any of you actually tryied to create a team of 6-8 Ordos trike and then raid the ennemy Harversters then you would understand the power it represent. It's much like playing C&C and creating a missile trike squad to harass/destroy ennemy Harvesters before they can bring units to defend them. Cost them a lot of money and time trying to save their Harversters. If they bring forces to defend their Harvesters then they split their force and are easier to attack. If the base is attacked first they usually take the units defending the Harvesters to withdraw back to base and you can still attack the Harvesters again, dealing a hard blow both in their base and in their cash account.
Of course most of this is viable only in multiplayer, but I guess you get the idea.