Twincam Supercharged

4A-GZE

The 4A-GZE (produced in various forms from 1986 through 1995) was the supercharged version. Based on the same block and head, the 4A-GZE was equipped with a roots-type supercharger and therefore the compression ratio, valve timing and ports were modified. It was used in the supercharged AW11 Toyota MR2, rated at 145 hp (108 kW) and 140 ft·lbf (190 N·m). Later versions of this engine are rated 165 hp (127 kW) and 155 ft·lbf (210 N·m) for the AE92 and AE101 Corolla.

These engines are also popular for a turbo conversion, as many parts don't need to be modified to support the extra boost.