more specifics. i remember watching it as a kid way back in the 80′s. it was a raggedy cargo truck that turned into a yellow lamborghini. he had to battle a gang of bad guys wearing Motorcycle Helmets, driving black porsche’s with his super lambo. i think it took place in europe. i specifically remember one scene when he was driving head on into one of the porsche cars and he pressed a button and a ramp appeared over his lamborghini, shooting the evil porsche into the sky where it exploded upon impact with the ground. any information would help out a lot. thanks.

That’s "Condor man" with Michael Crawford for sure

Motorcycle helmet