Isuzu V12 F1 engine

The Isuzu V12 F1 engine was an experimental 75 degree, four-stroke, naturally aspirated V12 racing engine, designated P799WE, that Isuzu designed for Formula One between 1989 and 1991. It displaced 3.5 litres (3,493 cc) with an 85 mm bore and 51.3 mm stroke, a 13.0:1 compression ratio and a dry weight of 158 kg. Quoted output rose from 646 horsepower at 12,000 rpm in its early form to 765 horsepower at 13,500 rpm in its late form. It was fitted to the Lotus 102B and the 102C, but in its only track test the 102C was six seconds off the pace, Team Lotus chose not to use it in races, and Isuzu decided against entering Formula One.