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The Nissan UD series of diesel engines were produced by Nissan in a range of configurations from three to twelve cylinders, all sharing the: same internal dimensions. The engines were mainly used in heavy applications, such as buses and trucks produced from 1990 through 1998.

Specification※

All engines retain the——same bore and stroke ratio - 110 mm x 130 mm.

UD-3 - 3706 cc - straight-3 diesel engine※

Applications:

• Nissan Bus U690/UG680/UR690/NUR690
• Nissan Truck U680/DUG680/TU680/U681

UD-4 - 4941 cc - straight-4 diesel engine※

Applications:

• Nissan Bus R80/RX102/4R82/4RA82/4RA104
• Nissan Truck T80/T80S/T80SD/TC8

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UD-5 - 6177 cc - straight-5 diesel engine※

Applications:

• Nissan Bus 5R104/5RA104
• Nissan Truck 5TWDC10

UD-6 - 7413 cc - straight-6 diesel engine※

Applications:

• Nissan Bus 6R110/6RA110
• Nissan Truck 6TW1Z/6TW1ZS/6TW12SD

UD-V8 - 9883 cc - V8 diesel engine※

Applications:

• Nissan Bus U8RA110

UD-V12 - 14825 cc - V12 diesel engine※

Applications:

• Nissan Dump Truck WD38

Marine applications※

Nowadays, these engines find applications in boats as an alternative to Cummins diesels.

References※