Twenty years ago the world was introduced to a new machine produced inside a Sant’Agata Bolognese factory. Powered by a 5.0-liter V-10 engine (and later a 5.2-liter V-10), the original Lamborghini Gallardo roared to life and helped create a volume seller (relatively speaking) for the famed Italian automaker. Now, two decades on, Lamborghini has…