Humber’s four-wheel drives cover fifty years of British service: the FWD Heavy Utility “Box” of 1941–45, the only four-wheel-drive passenger car Britain built during the war and part of a 6,500-vehicle series; the Humber Armoured Car, 5,400 of them, a Guy design built by Rootes’ Karrier division; and the FV1600 Pig, about 1,700, rearmoured in the 1970s and serving in Northern Ireland into the early 1990s.
Car, Heavy Utility, 4×4 (FWD), Humber — the Box — on a 2,838 mm wheelbase, 1941–45, and the only four-wheel-drive passenger car Britain built during the war. About 6,500 vehicles were made across the FWD series, which also covered 8-cwt trucks, ambulances and armoured cars.
5,400 built between 1940 and 1945: a Guy body on Karrier’s KT 4 artillery tractor chassis, 6.3 tonnes with 21 mm of armour, a Rootes six of 90 hp, 50 mph and 200 miles, three crew or four in the Mk III.
About 1,700 one-ton armoured trucks of the FV1600 series: 4.93 m long, a Rolls-Royce B60 six of 120 hp, 40 mph and 250 miles, two crew and six passengers. The Mk 1 weighed 10,500 lb; the rearmoured Mk 2, 14,300 lb.