The company went from two engines on the XL 4100 excavator down to one 250-hp engine on the XL 4100-II, which is said to increase performance and save money on filters and downtime associated with routine maintenance. The 6×4 model weighs about 46,600 pounds, and the 6×6 machine weighs in at 48,350 pounds. Maximum digging depth is 20 feet 10 inches and 20 feet 6 inches, respectively. Maximum boom reach at ground line is up to 30 feet 1 inch. It reaches highway speeds up to 55 mph.