Engineering:Toyota N engine

Not to be confused with Toyota ND engine.

Toyota N engine
Overview
Manufacturer	Toyota Motor Corporation
Production	1986–1999
Layout
Configuration	Inline-four
Displacement	1.5 L (1,453 cc)
Valvetrain	SOHC 2 valves x cyl.
Combustion
Fuel system	Indirect injection
Fuel type	Diesel
Cooling system	Water-cooled
Output
Power output	54–66 hp (40–49 kW; 55–67 PS)
Torque output	9.1–14.0 kg⋅m (89–137 N⋅m; 66–101 lb⋅ft)
Chronology
Successor	Toyota ND engine

The Toyota N engine is a series of diesel engines manufactured by Toyota from 1986 to 1999. The N series comprises small displacement, inline-four diesel units designed for compact passenger vehicles.

1N

The 1N is a 1.5 L (1,500 cc) inline-four diesel engine. It utilizes a single overhead camshaft (SOHC) configuration with two valves per cylinder.

The engine's internal dimensions feature a bore of 74 mm (2.9 in) and a stroke of 84.5 mm (3.33 in), resulting in a compression ratio of 22:1. In terms of performance, the naturally aspirated 1N produces a peak power output of 55 PS (40 kW; 54 hp) at 5,200 rpm. Torque output ranges from 9.1 kg⋅m (89 N⋅m; 66 lb⋅ft) to 9.3 kg⋅m (91 N⋅m; 67 lb⋅ft), depending on the specific vehicle application.

Applications

• 55 PS (40 kW; 54 hp) at 5,200 rpm, 9.3 kg⋅m (91 N⋅m; 67 lb⋅ft) at 3,000 rpm (Net):
  • 3rd and 4th Generation Toyota Starlet (NP70/80)

• 55 PS (40 kW; 54 hp) at 5,200 rpm, 9.1 kg⋅m (89 N⋅m; 66 lb⋅ft) at 2,600 rpm (Net):
  • 5th Generation Toyota Starlet (NP90)

1N-T

The 1N-T is the turbocharged variant of the 1.5 L diesel engine. While sharing the same bore and stroke (74 mm and 84.5 mm) and 22:1 compression ratio as the standard 1N, the addition of forced induction increases performance significantly.

The 1N-T generates a peak power output of 67 PS (49 kW; 66 hp). Torque is also improved, ranging between 13.3 kg⋅m (130 N⋅m; 96 lb⋅ft) and 14.0 kg⋅m (137 N⋅m; 101 lb⋅ft), providing greater pulling power for the vehicles it powers.

Applications

• 67 PS (49 kW; 66 hp) at 4,700 rpm, 13.3 kg⋅m (130 N⋅m; 96 lb⋅ft) at 2,600 rpm (Net):
  • 2nd Generation Toyota Corolla II / Toyota Corsa / Toyota Tercel (NL30)

• 67 PS (49 kW; 66 hp) at 4,500 rpm, 14.0 kg⋅m (137 N⋅m; 101 lb⋅ft) at 2,600 rpm (Net):
  • 3rd Generation Toyota Corolla II / Toyota Corsa / Toyota Tercel (NL40)

• 67 PS (49 kW; 66 hp) at 4,200 rpm, 14.0 kg⋅m (137 N⋅m; 101 lb⋅ft) at 2,600 rpm (Net):
  • 4th Generation Toyota Corolla II / Toyota Corsa / Toyota Tercel (NL50)