The Alfa Romeo 690T is a twin-turbocharged, direct injected, 90° V6 petrol engine designed and produced by Alfa Romeo since 2015.^[4] It is used in the high-performance Giulia Quadrifoglio and Stelvio Quadrifoglio models and is manufactured at the Stellantis Termoli engine plant.^[5]

The 690T is often considered to be the Ferrari F154 engine with two less cylinders, but in fact it is a completely new engine developed by the same engineer, Gianluca Pivetti, of the F154, that shares some peculiarities Alfa knew worked well and to reduce development time.^[6]

This 2.9-litre V6 uses single-scroll rather than twin-scroll turbos, which produce 1.4 bars (20 psi) of boost pressure. Alfa also added mechanical cylinder deactivation to the right bank for increased highway fuel efficiency. The 90-degree V6 engine's crankshaft has three crankpins 120 degrees apart, each with two connecting rods mounted side by side. This configuration results in uneven firing at 90 and 150 degrees of each rotation, but for each cylinder bank results in even pulses every 240 degrees, providing evenly-spaced exhaust pulses to the each turbocharger and allowing one bank to deactivate.^[2] Additionally, from 2020 onward, Alfa added port injection, doubling the number of injectors to 12.^[1][7][8]

The Maserati 3.0-litre V6 Nettuno engine, introduced in the Maserati MC20, shares many of its characteristics with the Ferrari F154 and the Alfa Romeo 690T engines.^[8][9]

In 2023 Alfa Romeo presented 33 Stradale model that featured bigger displacement 690T engine. Now at 3.0-litres and producing 620 PS.^[10]

• Alfa Romeo Giulia Quadrifoglio
• Alfa Romeo Stelvio Quadrifoglio
• Alfa Romeo Giulia GTA and GTAm
• 2023 Alfa Romeo Giulia SWB Zagato