| V/Line N Class | 
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| | Specifications | 
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 | Configuration: 
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 | • UIC | Co-Co | 
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 | Gauge | 1,435 mm (4 ft 8+1⁄2 in), 1,600 mm (5 ft 3 in)
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 | Length | 18.87 m (61 ft 11 in) | 
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 | Loco weight | 123 tonnes (121 long tons; 136 short tons) | 
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 | Fuel type | Diesel | 
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 | Fuel capacity | 6,800 L (1,500 imp gal; 1,800 US gal) | 
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 | Lubricant cap. | 625 L (137 imp gal; 165 US gal) | 
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 | Coolant cap. | 882 L (194 imp gal; 233 US gal) | 
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 | Prime mover | Order 1: EMD 12-645E3C Order 2: EMD 12-645E3B
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 | RPM range | 300–904 | 
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 | Engine type | Two-stroke diesel | 
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 | Generator | EMD AR10-JJD-D18 Some converted to AR10-CA5
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 | Traction motors | EMD D77 (Originally built with D43)
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| | Performance figures | 
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 | Maximum speed | 130 km/h (81 mph) | 
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 | Power output | 1,846 kW (2,476 hp) | 
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 | Tractive effort | Starting: 289 kN (65,000 lbf) Continuous: 260 kN (58,000 lbf) at 21 km/h (13 mph)
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| | Career | 
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 | Operators | V/Line, SSR | 
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 | Number in class | 25 | 
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 | Numbers | N451-N475 | 
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 | Nicknames | Dog bones | 
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 | First run | 1985 | 
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 | Current owner | V/Line | 
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 | Disposition | 25 in service | 
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The N Class are a class of diesel locomotives built by Clyde Engineering in Somerton for V/Line between 1985 and 1987.