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.
The 1N is a 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 and a stroke of , resulting in a compression ratio of 22:1. In terms of performance, the naturally aspirated 1N produces a peak power output of at 5,200 rpm. Torque output ranges from to , depending on the specific vehicle application.
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 . Torque is also improved, ranging between and , providing greater pulling power for the vehicles it powers.