Opel Monterey Workshop & Owners Manual | Free Download Opel Monterey. Originally produced by Japanese automaker Isuzu between 1981 and 2005, the Isuzu Trooper is sold in UK as Opel Monterey. This is a midsize SUV with two generations in the market. The second generation was available in 1992 with a complete Vauxhall - Car Manuals PDF & Fault Codes DTC Brand Vauxhall-H (10NR) in 1938 became the first British car with a monocoque body. It was a 3-speed gearbox, and the average fuel consumption of less than 9 liters per 100 km. In 1939, all Vauxhall cars got hydraulic brakes. sales growth contributed to a new cheap car Series U (14HP) middle class with a 6-cylinder engine in 1781 cc.