Alfa Romeo 690T engine

Not to be confused with the 1996 Alfa Romeo 690 engine powering the Alfa Romeo 155 V6 TI.
Alfa Romeo 690T engine
Giulia Quadrifoglio engine bay
Overview
ManufacturerAlfa Romeo
DesignerGianluca Pivetti
Production2015–present
Layout
Configuration90° V6
Displacement2.9 L; 176.4 cu in (2,891 cc)
Cylinder bore86.5 mm
Piston stroke82.0 mm
Cylinder block materialClosed-deck Aluminium
Cylinder head materialAluminium
ValvetrainDOHC, 24-valve
Valvetrain drive systemChain
Compression ratio9.3:1
RPM range
Max. engine speed7,400 rpm[1]
Combustion
TurbochargerTwo single-scroll parallel turbochargers (IHI) with air-to-liquid intercooler
Fuel systemPort and direct injection
Management2× Bosch Motronic[2]
Fuel typePetrol
Oil systemWet sump with water heat exchanger[3]
Cooling systemWater-cooled
Output
Power output375–397 kW (510–540 PS; 503–533 hp)
Torque output600 N⋅m (443 lb⋅ft)
Dimensions
Dry weight218 kg (481 lb)[2]
Chronology
PredecessorAlfa Romeo JTS engine

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 Alfa Romeo Termoli engine plant.[5]

Description

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 each turbocharger and allows 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 the 33 Stradale model that featured a bigger displacement 690T engine. Now at 3.0-litres and producing 456 kW (620 PS).[10]

Applications

Alfa Romeo

Eng. code Displacement
Bore x stroke		 Years Usage Peak power Peak torque
690T 2,891.26 cc (176 cu in) 86.5 x 82 mm

481.877 cc (29 cu in) per cylinder 		2016–present[11] Giulia Quadrifoglio

Stelvio Quadrifoglio

510 PS (375 kW; 503 hp) at 6500 rpm 600 N⋅m (443 lbf⋅ft) from 2500 to 5000 rpm
2016–2024[12][13] Giulia Quadrifoglio

Stelvio Quadrifoglio
(North America)

512 PS (377 kW; 505 hp) at 6500 rpm
2019 Giulia Quadrifoglio Racing Edition

Stelvio Quadrifoglio Racing Edition

520 PS (382 kW; 513 hp) at 6500 rpm
2023–present[14] Giulia Quadrifoglio

Stelvio Quadrifoglio
(Europe, UK & China)

2020 Giulia GTA / GTAm 540 PS (397 kW; 533 hp) at 6500 rpm

References

  1. ^ a b "2020 Alfa Romeo Giulia Specifications" (PDF). Alfa Romeo.
  2. ^ a b c Daudo, Franco (March 23, 2019). "Alfa Romeo: la tecnica del V6 di Giulia e Stelvio Quadrifoglio". Auto Tecnica (in Italian).
  3. ^ Alfa Romeo Giulia Technical Training Quadrifoglio Mechanical Systems (PDF). FCA. Archived from the original (PDF) on 2023-01-29.
  4. ^ Daudo, Franco (2019-03-23). "Alfa Romeo: la tecnica del V6 di Giulia e Stelvio Quadrifoglio". Auto Tecnica (in Italian). Retrieved 2024-01-15.
  5. ^ "Termoli to Produce Two New Engines for Alfa Romeo". media.stellantis.com. Retrieved 21 February 2024.
  6. ^ "Gianluca Pivetti, responsabile sviluppo motori Alfa Romeo: "V6 Giulia fiore all'occhiello"". automoto.it (in Italian). Retrieved 21 February 2024.
  7. ^ Reibakas, Santiago (October 17, 2022). "A Detailed Look At The Alfa Romeo Giulia Quadrifoglio's Engine". hotcars.com.
  8. ^ a b Tatarevic, Bozi (2 July 2020). "Maserati's All-New Twin-Turbo V-6 Actually Shares a Ton of Parts with Ferrari and Alfa". Road & Track.
  9. ^ Melone, Alessandro (July 2, 2020). "Maserati, motore Nettuno un V6 Alfa Romeo in prestito?" [Maserati, Neptune engine a V6 Alfa Romeo on loan?]. Vehicle Cue (in Italian).
  10. ^ "Alfa Romeo 33 Stradale Debuts With 620 HP And Even More Potent EV Version". Motor1.com. August 30, 2023.
  11. ^ "MY23 Buyers Guide - January 2024" (PDF). www.alfaromeo.com.au.
  12. ^ "Press Kit: 2023 Alfa Romeo Giulia". www.alfaromeousa.com. Retrieved 31 March 2024.
  13. ^ "Alfa Romeo Giulia and Stelvio Quadrifoglio Models Gone After 2024". Car_and_Driver. Retrieved 31 March 2024.
  14. ^ "Orders kick off for the New Giulia and Stelvio Quadrifoglio". Retrieved 31 March 2024.