The special versions of the Giulia Quadrifoglio and Stelvio Quadrifoglio share a red-and-white livery inspired by the company's return to Formula 1 for the 2019 season. Each car gains an Akrapovič titanium exhaust, which liberates 10bhp from the 2.9-litre BiTurbo V6 in both cars.
An aero package developed with help from Sauber adds a unique front splitter, more prominent rear spoiler and wider side skirts. Inside the cabin, unique stylistic details include Sparco racing seats with red stitching and carbonfibre shells, and carbonfibre inserts in the gearknob and steering wheel.
Just ten Giulia and three Stelvio models will initially be made available for UK customers, with prices starting from £89,500 for the Giulia saloon and £96,500 for the Stelvio SUV.
Both cars will be taking part in the Goodwood hillclimb at this year's Festival.
The Alfa Romeo Racing edition cars were first revealed at the Geneva motor show earlier this year alongside the Stelvio Ti, equipped with a 276bhp 2.0-litre turbo petrol engine, and a Giulia Veloce Ti in Misano Blue featuring extensive use of carbonfibre.
Alfa also used that event to announce trim level revisions and a rejigging of the engine range for the 2019 Alfa Giulietta: the Super, the Speciale and the Veloce. There is now a choice of three different Euro 6D-compliant engines – a 1.4-litre 118bhp turbo petrol and 1.6-litre 118bhp diesel in manual or automatic, plus a 2.0-litre 168bhp diesel available in TCT automatic transmission only.
The entry-level Super comes with cruise control, dual air-con, front foglights and rear parking sensors as standard; side skirts, sports seats, tinted windows and an oversized exhaust come with the Speciale; and the top-of-the-range Veloce includes 18in dark alloy wheels, twin exhausts, Alcantara and fabric seats, electric mirrors, auto headlights and wipers, and Uconnect 6.5in infotainment.