RIV stands for Rapid Intervention Vehicle. Alvis-Unipower RIV is the airfield fire truck with a capacity of the water tank of 2275 liter tank and foam tank of 275 liters. For the engine was chosen turbocharged Detroit Diesel 6V92-TA engine with an output of 475 hp. Maximum speed is 120 km/h. Acceleration from 0 to 80 km/h in 23 seconds. The main application of the truck is service at military airfields.