There were more than one engine type named Nissan D-series

D10

The D10 was a 0.9 L (860 cc/52 in³)engine is a flat-head sleeve valve

Sleeve valve

The sleeve valve is a type of valve mechanism for piston engines, distinct from the usual poppet valve. Sleeve-valve engines saw use in a number of pre-World War II luxury cars and in USA in the Willys-Knight car and light truck...

 automobile

Automobile

An automobile, autocar, motor car or car is a wheeled motor vehicle used for transporting passengers, which also carries its own engine or motor...

 engine produced from 1952 through 1955. Bore was 60 mm (2.4 in) and stroke was 76 mm (3 in) in the undersquare British

United Kingdom

The United Kingdom of Great Britain and Northern IrelandIn the United Kingdom and Dependencies, other languages have been officially recognised as legitimate autochthonous languages under the European Charter for Regional or Minority Languages...

 style. The engine was related to the Austin A-Series engine.

Output was 25 hp (18.6 kW) and 35.4 ft·lbf (48 Nm) with a single carburetor

Carburetor

A carburetor , carburettor, or carburetter is a device that blends air and fuel for an internal combustion engine. It is sometimes shortened to carb in North America and the United Kingdom....

.

Applications:

• 1952 Datsun DC-3
  Datsun DC-3
  The Datsun DC-3 was a lightweight automobile produced by Nissan and sold under the Datsun brand in 1952. The series was a predecessor to the Fairlady sports cars, and succeeded the pre-war Road Star. It was powered by the 860 cc Nissan D10 straight-4 engine which produced and could propel the...
  
  
• 1953-1954 Datsun 6147 Pickup
• 1955-1957 Datsun 120 Series Truck
  Datsun Truck
  The popular and economical Datsun/Nissan compact pickup truck was produced in Japan from 1955 and imported to the United States, Australia, Finland, the Middle East, South Africa, and various European countries...
  
  
• 1953-1954 Datsun DB-5 and DB-6
• 1953-1954 Datsun DS-5 and DS-6

D11

The D11 is a 1138cc (69.4cuin) pushrod, three main, OHV 4cyl with wedge combustion chambers, and a bore & stroke of 73mm x68mm /2.874"x 2.677", a compression ratio of 8:1, and was rated at 29ps @2880 rpm (D11-PU 41-U model). It weighed 137.5 kg. Similar to the E & J series, and Austin A series in layout, it had a gear driven cam drive similar to the larger SD series diesels, it was used in Datsun FG003 forklifts in the 1960s.

Applications:

• 1958-1966 Datsun Cablight A20, A120, A220, A221