For reasons unknown, Nissan decided to call their new much larger truck Junior.
In December 1953 the Nissan Motor Co. signed a "technological co-operation agreement" with the Austin Motor Co. Ltd. of Great Britain. The result of this agreement gave Nissan the rights to build and market the Austin A40, and later the Austin A50, in Japan. It also let them use the Austin engines and chassis technology as a basis for future Nissan vehicles. By 1956 Nissan were building Austin sedans under licence in Japan, but the first vehicle Nissan designed and built themselves using an Austin engine was the B40 Nissan Junior.
Junior is a truly odd name for this vehicle, especially when you consider that the Junior is quite a large vehicle, and at over 6 foot tall it towers over the smaller pickups in the range. Like several other Nissan vehicles from this era, it's styling was a mix of British and American influences. The Junior was almost a cross between an Austin A40 and a 1950s Ford F100.
The grille on the B40 was a pressed steel design that was painted white. It had three rows of horizontal slots, with the top slots being narrow, the middle ones slightly wider, and the bottom slots being wider again. Under this top section there was a wider section with a series of 14 small vertical slots. This lower section incorporated the front indicators.
In late 1957 the B42 was introduced, which was a minor face lift of the B40. The B42 had a slightly different grille. On the B42 the big horizontal slots are all the same size, and in the lower section it still has 14 vertical slots, but it no longer incorporates the indicators, instead only the top section of the grille goes over the indicators.
The Junior had a seperate ladder chassis and had leaf springs front and back. It sat on large 16 inch split rim wheels and was rated to carry a 1750kg payload.
The B40 Junior was powered by the 1500cc version of the Austin B series OHV 4 cylinder engine, which produced 50hp.
The Nissan Junior B42 was in production until late 1959, when it was replaced by the Nissan Junior B140.
The truck version was available with either a "styleside" cargo area as pictured here, or with a steel cargo area with fold down sides.
A rather odd, chunky looking delivery van version was also introduced at the same time as the truck.
In late 1957 the B42 was introduced with a slightly different grille. On the B42 the big horizontal slots are all the same size, and in the lower section it still has 14 vertical slots, but it no longer incorporates the indicators, instead only the top section of the grille goes over the indicators. The Junior name is pressed into the top of the grille, on the B40 there was nothing written on the grille.
Length - 4290mm
Width - 1675mm
Height - 1820mm
Wheelbase - 2500mm
Weight - 1475kg
Top speed - 90kph
Transmission - 4 speed Column change
Model - 1H type
OHV 4 Cylinder
Capacity - 1489cc
Bore & Stroke - 73x89mm
Power - 50hp@4400rpm
Torque - 10.2kg/m@2100rpm
Compression - 7.2 : 1
Carburettors - Stromberg 30VIG-10
Final Drive - unknown
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