its called the z20net when in the Vectra, and called the b207 when in the saab ,same engine , just the Vauxhall Vectra just do 1 option being 175 bhp standard , the saab do 3 , a 1.8 turbo which is a 2.0 detuned 150bhp , a 2.0t 175 bhp and a 210 bhp engine which is in the saab aero comes with different cams ,injectors , and turbo ,,,