i think your looking at it wrong. instead of spunking thousands of pounds and the man hours on a rattly old tin box for a possible brief moment of glory (although the chance of ever landing next to a lambo at the traffic lights has got to be pretty slim)why not put the effort into trying harder in real life so hopefully you can someday afford a lambo?
giving the chances of coming across one at the lights,him wanting to race a rusty shed and you winning should he go for it its unlikely.
plus even if you did win, your still the one going home in a scrapper. what a glory