More Specifications:
Armor
13 mm (.51 in)

Main armament
8" (203 mm) M201A1 Howitzer
2 Rounds

Engine
Detroit Diesel 8V71T, 8-cylinder, 2-stroke, turbocharged Diesel
405 hp (302 kW)

Suspension
Torsion bar

Operational
range
523 km (325 mi)

Speed
54.7 km/h (30 mph

Source:
http://en.wikipedia.org/wiki/M110_howitzer