Does it come with a spare wheel?
only...
there is plenty of weight you could lose.
just depends how extreme you wanted to go.
and most people who have bought a brand new car are not fond of ripping it to peices.
i reckon 12-18 months time fully stripped ones, caged etc will be about.
The aircon would probably weigh 20kgs, but it'd be easier not to tick that option box in the first place...