Making Of 4 Wheel Robot

Hello Guys my Self Mohanish From India and i'm also an Mechanical Engineer and working as a Designer. i would like to know that i'm using 4 Number of DC gear motors
Output shaft = 4mm dia.
Voltage = 6V
Speed = 133 rpm
No load current = 0.35 A
Stall current = 5.5 A
Stall torque = 8.8 Kg/cm
Motor RPM = 10,000 +/- 5%.

is Arduino Motor Shield will useful for this Project? means this motor shield is capable to take load of 4 DC gear motors????

if yes then no issue but if no then tell me the other options

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The Arduino motor shield controls 2 motors upto about 1A (peaks of 2A for short
time).

You probably need more powerful H-bridges, and for low voltage high current
MOSFET H-bridges would be much better than Darlington ones. Pololu.com
(among others) has a range of motor drivers for DC motors of various ratings.