The Toyota 1JZ engine, an inline 6-cylinder engine, was introduced in 1990 as an upgrade to the Toyota M engine. Its 5L (491cc) displacement made it a preferred power source for racing and modified cars, commonly found in models such as the Crown, Mark II, and Supra.
The 1JZ and 2JZ are two well-known engine models from Toyota, namely the 1JZ-GTE VVT-i and 2JZ-GTE. The significant difference between them lies in their turbocharger configuration and displacement: the 1JZ uses a single turbocharger with a 5-liter displacement, while the 2JZ features twin turbochargers with a different displacement.
When discussing the working principle of an engine, the firing order is a key element. Specifically, when cylinder 1 is firing, cylinder 3 is in the compression stage, cylinder 4 is in the intake stage, and cylinder 2 is in the exhaust stage. The 1JZ-GE engine was launched in 1990 and discontinued in 1995. This engine features a dual overhead camshaft and 24-valve design, but it does not come equipped with VVT-I technology, and its compression ratio is set at 10:1.