Mamma Mia! Alfa Romeo is alive and kicking. Since the Stelvio SUV broke cover five years ago, hardly anything new has been heard from the famous brand with the snake emblem. What little did occur over the period was not good either. The Italians thinned out the range, dropping the 4C and the Giulietta. Apart from the big Stelvio off-roader, there was little else on the showroom floor. Now Alfa is back with a vengeance and bearing down on the most important segment of the market. The new offering is a pretty, compact SUV which is available as electrified petrol hybrid. The Tonale pushes all the…