It will also launch a new mid-sized SUV and a large SUV that sit, respectively, below and above the Stelvio, which has brought huge success to Alfa Romeo since launching last year.
The Italian brand also confirmed long-wheelbase versions of the Giulia and Stelvio. LWB variants are a growing trend, thanks largely to demand in China, where chauffeur-driven cars are popular.
The strategy should mean 400,000 sales for Alfa Romeo by 2022, said brand boss Timothy Kuniskis. This year's sales are projected at 170,000 units.
The new additions coming by 2022 will almost double Alfa Romeo's line-up, bringing the range to nine models. Currently, it consists of the Giulia, Giulietta, Stelvio, 4C Spider and Mito. The Mito had been highly tipped to be axed, and although there was no mention of it in today's announcement, a product plan slide suggested that the model will be phased out by 2022.
The new 8C will be a twin-turbo mid-engined sports car with an electrified front axle delivering at least 700bhp with a 0-62mph time of less than three seconds.
The last time we saw the 8C nameplate was during 2007-2010 with the 8C Competizione, which was a front-engined model that used a 4.7-litre Ferrari-derived V8 and achieved the benchmark sprint in 4.2sec.