 Based on the M3 Half @-@ track , the T30 's specifications were similar to its parent vehicle . It was 20 ft 7 in ( 6 @.@ 28 m ) long , 6 ft 5 in ( 1 @.@ 96 m ) wide , 8 ft 3 in ( 2 @.@ 51 m ) and high , and weighed 10 @.@ 3 short tons ( 9 @.@ 3 t ) . The suspension consisted of vertical <unk> springs for the tracks and leaf springs for the wheels , while the vehicle had a fuel capacity of 60 US gallons ( 230 l ) . It had a range of 150 mi ( 240 km ) and had a speed of 40 mph ( 64 km / h ) , and was powered by a White <unk> , 147 hp ( 110 kW ) , 386 <unk> ( 6 @,@ 330 <unk> ) , six @-@ cylinder , gasoline engine , with a compression ratio of 6 @.@ 3 : 1 . It had a power @-@ to @-@ weight ratio of 15 @.@ 8 hp / ton . 
