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Only 20
I'm pretty sure there's two aventadors in Australia. A white one and a two toned one.
Lamborghini is planning to make 4000 Aventadors in the next few years (The Murcielago had 4099 Examples, including LP650-4's, SuperVeloces and the Original model) Lamborghini has made 8 Moulds for the Aventador body. These moulds can only last up to 500 Bodyshells. so if you do the math, 500x8=4000
there are 173 types of Lamborghini
Right now, as you're reading this, another Lamborghini is being made. There is not a limited amount of Lambo's in the world(with the exception of the Lamborghini Reventon). There are only 25 Lamborghini Reventon's currently out now.
56765
There are 114 in the world, and 28 in the USA alone. However, you can go into any VW/AUDI dealer and order there, because essentially, they own Lamborghini.
4, Lamborghini Diablo, Lamborghini Murcielago, Lamborghini Gallardo, Lamborghini Reventon
not much because most people cant afford it
Only one: Lamborghini.
you can get this in the Lamborghini site.
A Bugatti is the fastest car in the world (proven by Guiness World Records). But to answer another possible question you might have, Lamborghini's are faster then Ferrari's and its been proven by many people and organizations.