The Challenger 2 is an extensive redesign of the Challenger 1. Although the hull and automotive components seem similar, they are of a newer design and build than those of the Challenger 1 and only around 3% of components are interchangeable.[ A visual recognition feature is the armoured housing for the TOGS thermal gunsight; the Challenger 2 has this above the gun barrel, the Challenger 1 has it at the right hand side of the turret. The tank's drive system provides a 550 km range, with a maximum road speed of 59 km/h.
Armed with a 120mm rifled cannon the Challenger holds the record for the longest range 'kill' of any tank.
