The Soviets based the BTR-80 on the BTR-70 APC. It has a single 260-hp, V-8 turbocharged, water-cooled, diesel engine, an improvement over the twin gasoline engines installed in the BTR-60 and BTR-70 vehicles. The reconfigured rear portion of the hull accommodates a new, single engine. The Soviets removed the roof chamfers of the modified BTR-70, raised the rear, and squared off the rearward-sloping engine compartment. Standard equipment include TNPO vision blocks, optical devices TNP-B and TKN-3 for the driver and commander, an OU-3GA2M infra-red search light, six 81 mm smoke grenade launchers 902V Tucha, a radioset (R-173 or R-163-50U), an intercom and hydrojets.