Output for the early non-turbo (1990-1995) 1JZ-GE was 170 PS (125 kW; 168 bhp) at 6000 rpm and 235 N·m (173 lb·ft) at 4800 rpm.
Later released non-turbo (1995->) 1JZ-GE had output of 200 PS (147 kW; 197 bhp) at 6000 rpm and 251 N·m (185 lb·ft) at 4000 rpm.

The 2.5-litre 1JZ uses oversquare bore dimensions (86 x 71.5mm) and, in naturally aspirated guise, a 10:1 compression ratio.
With the aid of a DOHC, 24-valve head and a dual-stage intake manifold. Like all JZ-series engines, the early 1JZ-GE is designed for longitudinal mounting and rear-wheel-drive.
All of these models also came with a 4-speed automatic transmission as standard; no manual gearbox option was offered

In around 2000, Toyota introduced what are probably the least recognised members of the JZ engine family – the FSE direct injection variants. These FSE 1JZ and 2JZ engines are aimed at achieving minimal emissions and fuel consumption together with no loss of performance.

The 2.5-litre 1JZ-FSE employs the same block as the conventional 1JZ-GE; everything up top, however, is unique. The ‘D4’ FSE employs a relatively narrow angle cylinder head with swirl control valves that serve to improve combustion efficiency. This is necessary to run at extremely lean air-fuel ratios around 20 to 40:1 at certain engine load and revs. Not surprisingly, fuel consumption is reduced by around 20 percent (when tested in the Japanese 10/15 urban mode)