On March 16, a full grid of turbocharged Formula 1 cars will line up for the first time since the 1986 Australian Grand Prix. Prior to 2014, that was the only season in which F1's rules mandated the use of a turbo engine.
Since the end of 1988, when turbos were outlawed, F1 has been an exclusively atmospheric affair, but memories of the fire-breathing, howling 1.5-litre V6 and straight-four powerplants, capable in some cases of putting out upwards of 1500bhp, that dominated the sport during the turbo era have stuck.
These new-generation turbos will be almost unrecognisable as being from the same family.